wxGUI/forms: fix g.remove/g.list all selection

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@67467 15284696-431f-4ddb-bdfa-cd5b030d7da7

gui/wxpython/gui_core/forms.py

@@ -197,7 +197,7 @@ class UpdateThread(Thread):
                 type_param = self.task.get_param('type', element='name', raiseError=False)
 
                 if 'all' in type_param.get('value'):
-                    etype = type_param.get('values')
+                    etype = type_param.get('values')[:]
                     if 'all' in etype:
                         etype.remove('all')
                     etype = ','.join(etype)