VCS: Offer to save-all before commit

Task-number: QTCREATORBUG-3857
Change-Id: I3ff3d90803eec4134b9da4af5567753ad7bffafb
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/plugins/bazaar/bazaarplugin.cpp

@@ -509,6 +509,9 @@ void BazaarPlugin::createSubmitEditorActions()
 
 void BazaarPlugin::commit()
 {
+    if (!promptBeforeCommit()))
+        return;
+
     if (raiseSubmitEditor())
         return;