Fixes: Added dbl-click handling for remote branches

Task:
RevBy:
AutoTest:
Details: Moved code to create a local branch from model to dialog which is slightly better since all the modifying app code is there.

src/plugins/git/branchmodel.h

@@ -87,6 +87,7 @@ public:
 
 signals:
     void newBranchCreated(const QString &);
+    void newBranchEntered(const QString &);
 
 private slots:
     void slotNewBranchDelayedRefresh();