Delete rubberband if deactivating capture tool

Author: mhugent

src/app/qgsmaptoolcapture.cpp

@@ -67,6 +67,8 @@ void QgsMapToolCapture::deactivate()
   while ( !mSnappingMarkers.isEmpty() )
     delete mSnappingMarkers.takeFirst();
 
+  stopCapturing();
+
   QgsMapToolEdit::deactivate();
 }