Docstr improvement.
CKEditor 4.3.4 changelog and API docs changes.
Updated translations
Started 4.3.5 development.
Added missing requirement in docprops plugin.
Changelog entry.
Merge branch 't/11717'
Reverted 2cf790ed.
Block default actions of undo/redo keystrokes only in wysiwyg mode.
Changelog entry.
Merge branch 't/11677'
Added changelog changes proposed by Anna.