VCS: Notify project wizard about config changes

... and have the project wizard update the available VCS.

Task-number: QTCREATORBUG-4423

src/plugins/coreplugin/iversioncontrol.h

@@ -166,6 +166,7 @@ public:
 signals:
     void repositoryChanged(const QString &repository);
     void filesChanged(const QStringList &files);
+    void configurationChanged();
 
     // TODO: ADD A WAY TO DETECT WHETHER A FILE IS MANAGED, e.g
     // virtual bool sccManaged(const QString &filename) = 0;