core, frontends: various fixes for Libervia:

- quick_app: don't fail when we can't get autodisconnect parameter
    - bridge: removed useless BridgeFrontend parent class
    - use of TypeError, unicode and list to workaround Pyjamas incompatibilities

src/core/sat_main.py

@@ -36,7 +36,6 @@ from sat.tools.common import dynamic_import
 from sat.stdui import ui_contact_list, ui_profile_manager
 import sat.plugins
 from glob import glob
-from uuid import uuid4
 import sys
 import os.path
 import uuid
@@ -733,7 +732,7 @@ class SAT(service.Service):
         """
         callback_id = kwargs.pop('force_id', None)
         if callback_id is None:
-            callback_id = str(uuid4())
+            callback_id = str(uuid.uuid4())
         else:
             if callback_id in self._cb_map:
                 raise exceptions.ConflictError(_(u"id already registered"))