Update to Twitter Bootstrap 3

- Update modal form template
- Update button css classes
- Update search button
- Update templates with the replacement
  class="span12" -> class="col-xs-12 col-sm-12 col-md-12 col-lg-12"

Closes-Bug: #1350894:

Change-Id: Id2924cc3427485c949a57b08779a4c3795613aa4
Merge "Update to Twitter Bootstrap 3"