Fix partial HW dithered refreshes sometimes appearing to shift refreshed content (#6267)

* Fix HW dithered partial refreshes sometimes behaving as if the refreshed
content had moved a few pixels to the side...

Probably a kernel issue with the alignment fixup in the EPDC?

* Get rid of the legacy coordinates fixup

It shouldn't be necessary anymore.
And I'd rather fix the root cause, anyway.

* Bump base

(https://github.com/koreader/koreader-base/pull/1116)

* Missed a few DIVs in #6224

frontend/apps/reader/modules/readerstyletweak.lua

@@ -32,7 +32,7 @@ local TweakInfoWidget = InputContainer:new{
     is_global_default = nil,
     toggle_global_default_callback = function() end,
     modal = true,
-    width = Screen:getWidth()*3/4,
+    width = math.floor(Screen:getWidth() * 0.75),
 }
 
 function TweakInfoWidget:init()