Merge pull request #1507 from sylus/7.x-1.x

Prepare for 1.6 release.
Merge pull request #1508 from sylus/7.x-1.x

Prepare for 1.6 release.
Merge pull request #1509 from sylus/7.x-1.x

Prepare for 1.6 release.
Update WetKit Widgets for Issue #2321011 by sylus: Fixed File Entity + Media updates.