Remove unused code
Begin action display - expansion of It_Data to support descriptions,
      sequences and actions
Little fixes + try to hoversel GUI_TYPE_OBJECTs
Moving code to better places. No more editor logic in propview and
objtree. Property created in gui_widget and not in propview.
Can be dangerous if wdg doesnt belong to active context
Function renaming + CB_DEL registration to remove pfd
Valgrind fixes:
It_Data is pointed by Par_Field_Data and by the genlist. It made issues
where It_Data was freed by item_del when property update was still using
pfds pointing to this It_Data. I suppose the bug is in genlist or there
is something we didnt understand there.
To solve the issue, a ref counter has been added. It is incremented when
the It_Data is created and when it is pointed by the pfds. Only on 0,
the It_Data is freed.
Remove useless function.
Begin modify the properties view for callbacks
Support of actions in simulator mode. Previous callbacks are no more
supported.
A new view shows the sequences of the context and their actions.
Next: fix generation and espion, continue support of callbacks and
actions in editor (show, add, change).
Remove useless code
TODO: add detailed context generation process
Generator: typos
Support of callbacks/sequences/actions in generator
Espion supports new callbacks
Change TODO
remove no more used code
Action BigBang is created if doesnt exist.
propview is rebuilt only on MULTI_PROPERTY. Is it right? Do we have a
better flag for that?
Properties expanded by default
Update of propview_item_update
Window is connected to the the BigBang sequence at creation
Hoversel: fix display
Change cbs from view to editor to permit scalability