Merge pull request ckeditor#2188 from ckeditor/t/2187

Autocomplete dropdown mouseover no longer throws an error

Changelog entry.

Merge pull request ckeditor#1840 from ckeditor/t/1835

Fix integration with CKFinder

Changed link to the integration guide.

Merge pull request ckeditor#1320 from ckeditor/t/1319

Prevent of loading widgets if querySelectorAll is undefined

Changelog and API docs corrected for 4.7.3.

Changelog and API docs corrected for 4.7.2.

Updated changelog.

Updated the list of available translations in plugin definitions.

Updated language files.