Started 4.4 development.
Merge branch 'master' into major
Merge branch 'master' into major

Conflicts:
	CHANGES.md
Chrome needs some help selecting page breaks too.

Firefox seems to be able to select them without problems.  I don't
have IE to test with.
Merge branch 'master' into major
The button plugin language files are now supported on Transifex
Fixed the meta information for plugin-a11yhelp-dialogs
Updated doc strings to conform to JSDuck 5.x.
It doesn't make sense to cancel doubleclick.
Changelog entry.
Merge branch 't/11417'
Fixed editor#elementPath method in case when no selection is available.
Changelog entry.
Merge branch 't/11490'
Fixed: CKEDITOR.ui.dialog.file is clipped by parent iframe.
Removed uploadButton's size setting in Image2 dialog which is no longer relevant.
Changelog entry.
Merge branch 't/11253b'
Added target _blank to links in About Dialog.
Merge branch 'master' into major

Conflicts:
	CHANGES.md