* Make adding new branches more discoverable
 * Make adding tracking branches more discoverable
 * Update UI

Task-number: QTCREATORBUG-4943
Task-number: QTCREATORBUG-4944
Change-Id: Idcbf5f8321a3bd04c925e33d094bb479788a7d9b
Reviewed-on: http://codereview.qt.nokia.com/588


Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Tobias Hunger <tobias.hunger@nokia.com>