dictquicklookup(chore): simplify logic that disables wikipedia button

frontend/ui/widget/dictquicklookup.lua

@@ -27,7 +27,6 @@ local Blitbuffer = require("ffi/blitbuffer")
 Display quick lookup word definition
 ]]
 local DictQuickLookup = InputContainer:new{
-    wikipedia_button = true,
     results = nil,
     lookupword = nil,
     dictionary = nil,
@@ -187,7 +186,7 @@ function DictQuickLookup:update()
             {
                 {
                     text = _("Wikipedia"),
-                    enabled = self:isWikipediaActive(),
+                    enabled = not self.wiki,
                     callback = function()
                         UIManager:scheduleIn(0.1, function()
                             self:lookupWikipedia()
@@ -273,7 +272,6 @@ function DictQuickLookup:update()
             self.dict_frame,
         }
     }
-    self:nextWikipediaStatus()
     UIManager:setDirty("all", function()
         local update_region = self.dict_frame.dimen:combine(orig_dimen)
         DEBUG("update dict region", update_region)
@@ -311,18 +309,6 @@ function DictQuickLookup:getHighlightText()
     end
 end
 
-function DictQuickLookup:nextWikipediaStatus()
-    if self.wikipedia_button then
-        DictQuickLookup.wikipedia_button = false
-    else
-        DictQuickLookup.wikipedia_button = true
-    end
-end
-
-function DictQuickLookup:isWikipediaActive()
-    return self.wikipedia_button
-end
-
 function DictQuickLookup:isPrevDictAvaiable()
     return self.dict_index > 1
 end
@@ -396,7 +382,6 @@ function DictQuickLookup:onTapCloseDict(arg, ges_ev)
 end
 
 function DictQuickLookup:onClose()
-    self:nextWikipediaStatus()
     UIManager:close(self)
     for i = #self.window_list, 1, -1 do
         local window = self.window_list[i]