quick frontend (app): replaced OrderedDict by regular dict:

since Python 3.7 dict are officially ordered, so there is no need to use a specific class
anymore.

sat_frontends/quick_frontend/quick_app.py

@@ -31,7 +31,6 @@ from sat_frontends.quick_frontend import quick_contact_list
 from sat_frontends.quick_frontend.constants import Const as C
 
 import sys
-from collections import OrderedDict
 import time
 
 
@@ -320,7 +319,7 @@ class QuickApp(object):
 
         # frontend notifications
         self._notif_id = 0
-        self._notifications = OrderedDict()
+        self._notifications = {}
         # watched progresses and associated callbacks
         self._progress_ids = {}
         # available features
@@ -580,7 +579,7 @@ class QuickApp(object):
             listener will be callable only by one of the given profiles.
         """
         assert type_ in C.LISTENERS
-        self._listeners.setdefault(type_, OrderedDict())[callback] = profiles_filter
+        self._listeners.setdefault(type_, {})[callback] = profiles_filter
 
     def removeListener(self, type_, callback):
         """Remove a callback from listeners