1.6.3

Closed issues:

• Table using setSource(): Ability to add custom headline #650
• Double confirm alert #649
• Form - create "read-only" field #486

Merged pull requests:

• Update UI.php to let dev decide about naming #657 (@FabulousGee)
• Removed deprecated each functions from template parsing #654 (@abbadon1334)
• fix/#649 Double Confirm #653 (@ibelar)
• make templates-dir easier to customize #648 (@DarkSide666)
• Atk4/ui/table column image #645 (@skondakov)
• bugfix for confirm #644 (@DarkSide666)