Update README.md

(*) was replaced with <em>
Updated translations
Move one line  from "Other changes" to "Fixed Issues" in the changelog.
Update CHANGES.md
Started 4.4.2 development.
Less naive implementation of widgetsRepo.getByElement - always returns most inner widget.
Extracted constants from function, removed unnecessary safety check.
Added sample for nested widgets.
Simplified and optimized editor.widgets.getByElement().
Changelog entry.
Merge branch 't/11983'
Fixed: Caret possibly out of viewport if pressed BACKSPACE/DEL and Webkit/Blink custom handler is involved.
Changelog entry.
Merge branch 't/11960'
Fixed: No context menu entry on right-click in Webkit/Blink (Mac).
Made the code more straightforward.