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/ui/translator.lua

@@ -499,7 +499,7 @@ function Translator:_showTranslation(text, target_lang, source_lang)
             -- Showing the translation target language in this title may make
             -- it quite long and wrapped, taking valuable vertical spacing
         text = table.concat(output, "\n"),
-        height = Screen:getHeight() * 4/5,
+        height = math.floor(Screen:getHeight() * 0.8),
         justified = G_reader_settings:nilOrTrue("dict_justify"),
     })
 end