- Fixed yellow colours.

- Fixed a bug in scheduler, forgetting to block a thread.
- Added a grid feature to simulation_widget
- Added file->new.



git-svn-id: svn://svn.gna.org/svn/sgpemv2/trunk@1095 3ecf2c5c-341e-0410-92b4-d18e462d057c

src/backend/concrete_history.cc

@@ -298,6 +298,7 @@ ConcreteHistory::clear()
   _snapshots.clear();
   _snapshots.push_back(new ConcreteEnvironment());
   assert(_snapshots.size() == 1);
+  notify_change();
 }