Created by: tmentink
- collapse .form-control-* into .feedback-icon which updates its background-image based on the .has-* of its parent
- add :after to .form-control-feedback with content set by data-attributes based on .has-* of its parent
- add transitions to .input-group-addon and .feedback-icon to be in sync with .form-control
Fixes #22192 (closed)