Added ClearMessageWidget function to gui module

git-svn-id: https://dng.biozentrum.unibas.ch/svn/openstructure/trunk@2686 5a81b35b-ba03-0410-adc8-b2c5c5119f08

modules/gui/pymod/__init__.py

@@ -35,3 +35,7 @@ def CreateDataViewer(ih,flag=False):
         sip_viewer.closeEvent=_close_event_override_
         sip_viewer.setData=_set_data_override_
       return viewer
+
+def ClearMessageWidget():
+      gosty=GostyApp.Instance()
+      gosty.message_widget.Clear()