Removed "anchors" from link data format because it does not correspond with any link instance but an editor as a whole. Minor refactoring of link dialog.
Made link dialog fields bulletproof in case of uninitialized anchors array.
Changelog entry.
Merge branch 't/11801b'
Removed Source Dialog plugin from required in Code Snippet sample.
Changelog entry.
Merge branch 't/11859'
Changed minimum width from 0px to 1px.
Added comment.
Changelog entry.
Merge branch 't/11626'
Made dom.element#addClass chainable.
Changelog entry.
Merge branch 't/11872'
Fixed: parts#link discovered badly if upcasting existing widget (i.e. paste).
Changelog entry.
Merge branch 't/11813'
Fixed: Link and unlink entries persistently displayed in Image2 context menu regardles of linked state.
Changelog entry.
Merge branch 't/11814'