diff --git a/wtest.lua.bak b/wtest.lua.bak
deleted file mode 100644
index 306e20582..000000000
--- a/wtest.lua.bak
+++ /dev/null
@@ -1,284 +0,0 @@
-#!./koreader-base
-
-require "defaults"
-print(package.path)
-package.path = "./frontend/?.lua;./?.lua"
-local UIManager = require("ui/uimanager")
-local RenderText = require("ui/rendertext")
-local Font = require("ui/font")
-local Geom = require("ui/geometry")
-local Menu = require("ui/widget/menu")
-local Widget = require("ui/widget/widget")
-local InfoMessage = require("ui/widget/infomessage")
-local InputContainer = require("ui/widget/container/inputcontainer")
-local CenterContainer = require("ui/widget/container/centercontainer")
-local FrameContainer = require("ui/widget/container/framecontainer")
-local ConfirmBox = require("ui/widget/confirmbox")
-local TouchMenu = require("ui/widget/touchmenu")
-local InputText = require("ui/widget/inputtext")
-local DocumentRegistry = require("document/documentregistry")
-local ReaderUI = require("ui/readerui")
-local Dbg = require("dbg")
-local Device = require("ui/device")
-local Screen = require("ui/screen")
-
-
------------------------------------------------------
--- widget that paints the grid on the background
------------------------------------------------------
-TestGrid = Widget:new{}
-
-function TestGrid:paintTo(bb)
-    v_line = math.floor(bb:getWidth() / 50)
-    h_line = math.floor(bb:getHeight() / 50)
-    for i=1,h_line do
-        y_num = i*50
-        RenderText:renderUtf8Text(bb, 0, y_num+10, Font:getFace("ffont", 12), y_num, true)
-        bb:paintRect(0, y_num, bb:getWidth(), 1, 10)
-    end
-    for i=1,v_line do
-        x_num = i*50
-        RenderText:renderUtf8Text(bb, x_num, 10, Font:getFace("ffont", 12), x_num, true)
-        bb:paintRect(x_num, 0, 1, bb:getHeight(), 10)
-    end
-end
-
------------------------------------------------------
--- we create a widget that paints a background:
------------------------------------------------------
-Background = InputContainer:new{
-    is_always_active = true, -- receive events when other dialogs are active
-    key_events = {
-        OpenDialog = { { "Press" } },
-        OpenConfirmBox = { { "Del" } },
-        QuitApplication = { { {"Home","Back"} } }
-    },
-    -- contains a gray rectangular desktop
-    FrameContainer:new{
-        background = 3,
-        bordersize = 0,
-        dimen = Screen:getSize(),
-        Widget:new{
-            dimen = {
-                w = Screen:getWidth(),
-                h = Screen:getHeight(),
-            }
-        },
-    }
-}
-
-function Background:onOpenDialog()
-    UIManager:show(InfoMessage:new{
-        text = "Example message.",
-        timeout = 10
-    })
-end
-
-function Background:onOpenConfirmBox()
-    UIManager:show(ConfirmBox:new{
-        text = "Please confirm delete"
-    })
-end
-
-function Background:onInputError()
-    UIManager:quit()
-end
-
-function Background:onQuitApplication()
-    UIManager:quit()
-end
-
-
-
------------------------------------------------------
--- example widget: a clock
------------------------------------------------------
-Clock = FrameContainer:new{
-    background = 0,
-    bordersize = 1,
-    margin = 0,
-    padding = 1
-}
-
-function Clock:schedFunc()
-    self[1]:free()
-    self[1] = self:getTextWidget()
-    UIManager:setDirty(self)
-    -- reschedule
-    -- TODO: wait until next real second shift
-    UIManager:scheduleIn(1, function() self:schedFunc() end)
-end
-
-function Clock:onShow()
-    self[1] = self:getTextWidget()
-    self:schedFunc()
-end
-
-function Clock:getTextWidget()
-    return CenterContainer:new{
-        dimen = { w = 300, h = 25 },
-        TextWidget:new{
-            text = os.date("%H:%M:%S"),
-            face = Font:getFace("cfont", 12)
-        }
-    }
-end
-
------------------------------------------------------
--- a confirmbox box widget
------------------------------------------------------
-Quiz = ConfirmBox:new{
-    text = "Tell me the truth, isn't it COOL?!",
-    width = 300,
-    ok_text = "Yes, of course.",
-    cancel_text = "No, it's ugly.",
-    cancel_callback = function()
-        UIManager:show(InfoMessage:new{
-            text="You liar!",
-        })
-    end,
-}
-
------------------------------------------------------
--- a menu widget
------------------------------------------------------
-menu_items = {
-    {text = "item1"},
-    {text = "item2"},
-    {text = "This is a very very log item whose length should exceed the width of the menu."},
-    {text = "item3"},
-    {text = "item4"},
-    {text = "item5"},
-    {text = "item6"},
-    {text = "item7"},
-    {text = "item8"},
-    {text = "item9"},
-    {text = "item10"},
-    {text = "item11"},
-    {text = "item12"},
-    {text = "item13"},
-    {text = "item14"},
-    {text = "item15"},
-    {text = "item16"},
-    {text = "item17"},
-}
-M = Menu:new{
-    title = "Test Menu",
-    item_table = menu_items,
-    width = 500,
-    height = 600,
-}
-
-
------------------------------------------------------
--- a reader view widget
------------------------------------------------------
-readerwindow = CenterContainer:new{
-    dimen = Screen:getSize(),
-    FrameContainer:new{
-        background = 0
-    }
-}
-reader = ReaderUI:new{
-    dialog = readerwindow,
-    dimen = Geom:new{ w = Screen:getWidth() - 100, h = Screen:getHeight() - 100 },
-    document = DocumentRegistry:openDocument("test/2col.pdf")
-    --document = DocumentRegistry:openDocument("test/djvu3spec.djvu")
-    --document = DocumentRegistry:openDocument("./README.TXT")
-}
-readerwindow[1][1] = reader
-
-
-touch_menu = TouchMenu:new{
-    title = "Document menu",
-    width = Screen:getWidth(),
-    tab_item_table = {
-        {
-            icon = "resources/icons/appbar.pokeball.png",
-            {
-                text = "item1",
-                callback = function()
-                end,
-            },
-            {
-                text = "item2",
-                callback = function()
-                end,
-            },
-            {
-                text = "item3",
-                callback = function()
-                end,
-            },
-            {
-                text = "item4",
-                callback = function()
-                end,
-            },
-            {
-                text = "item5",
-                callback = function()
-                end,
-            },
-            {
-                text = "item6",
-                callback = function()
-                end,
-            },
-            {
-                text = "item7",
-                callback = function()
-                end,
-            },
-            {
-                text = "item8",
-                callback = function()
-                end,
-            },
-            {
-                text = "item9",
-                callback = function()
-                end,
-            },
-        },
-        {
-            icon = "resources/icons/appbar.page.corner.bookmark.png",
-            {
-                text = "item10",
-                callback = function()
-                end,
-            },
-            {
-                text = "item11",
-                callback = function()
-                end,
-            },
-        },
-        {
-            icon = "resources/icons/appbar.home.png",
-            callback = function()
-                DEBUG("hello world!")
-            end
-        }
-    },
-}
-
-inputtext = InputText:new{
-    width = 400,
-    height = 300,
-}
-
------------------------------------------------------------------------
--- you may want to uncomment following show calls to see the changes
------------------------------------------------------------------------
-UIManager:show(Background:new())
-UIManager:show(TestGrid)
---UIManager:show(Clock:new())
---UIManager:show(M)
---UIManager:show(Quiz)
---UIManager:show(readerwindow)
---UIManager:show(touch_menu)
---UIManager:show(keyboard)
-UIManager:show(inputtext)
-
-UIManager:run()