Populate Logical Model View when synchronization button is pushed.

Change-Id: If30cc1676c62cb438b6058a65ee6f27d7d72205e
Signed-off-by: Axel Richard <axel.richard@obeo.fr>
Logical Model View: handle models with errors

If synchronization model has errors, 
 - launch an error message dialog.
 - clean the logical model view.

Change-Id: Ia10f65eacaf6e6a2e035707f97d4627d7cec2efa
Signed-off-by: Axel Richard <axel.richard@obeo.fr>