Git: Fix crash on checkout branch

Task-number: QTCREATORBUG-9756
Change-Id: I3bdba870737bbffde6c0e6a9046a58ba78f097be
Reviewed-by: Eike Ziller <eike.ziller@digia.com>
Squish: Removed pointless progressBarWait()

Waiting already done in createNewQtQuickApplication()

Change-Id: Ibc9dfa1c5fdec0dd34c6dfe2e9c3e9fda6f55fa1
Reviewed-by: Christian Stenger <christian.stenger@digia.com>