[FIX] Issue 613
Use global configuration if builder one is defined to null (for fields and *actions)
Allow `label: false` definition to not display label in form
Merge pull request #627 from sescandell/fix-issue613

[FIX] Issue 613
Merge pull request #628 from sescandell/fix-label_rendering

Allow `label: false` definition to not display label in form
Add white glow around active element to emphasize it