improve Gajim startup by disabling roster sorting while adding rows

src/gui_interface.py

@@ -3246,8 +3246,10 @@ class Interface:
             self.show_systray()
 
         self.roster = roster_window.RosterWindow()
+        self.roster._before_fill()
         for account in gajim.connections:
             gajim.connections[account].load_roster_from_db()
+        self.roster._after_fill()
 
         # get instances for windows/dialogs that will show_all()/hide()
         self.instances['file_transfers'] = dialogs.FileTransfersWindow()

src/roster_window.py

@@ -284,7 +284,6 @@ class RosterWindow:
         self.starting = True
         jids = gajim.contacts.get_jid_list(account)
 
-        self.tree.freeze_child_notify()
         for jid in jids:
             self.add_contact(jid, account)
 
@@ -298,7 +297,6 @@ class RosterWindow:
             self.draw_group(group, account)
         self.draw_account(account)
 
-        self.tree.thaw_child_notify()
         self.starting = False
 
 
@@ -1364,6 +1362,17 @@ class RosterWindow:
         task = _draw_all_contacts(jids, account)
         gobject.idle_add(task.next)
 
+    def _before_fill(self):
+        self.tree.freeze_child_notify()
+        self.tree.set_model(None)
+        # disable sorting
+        self.model.set_sort_column_id(-2, gtk.SORT_ASCENDING)
+ 
+    def _after_fill(self):
+        self.model.set_sort_column_id(1, gtk.SORT_ASCENDING)
+        self.tree.set_model(self.modelfilter)
+        self.tree.thaw_child_notify()
+
     def setup_and_draw_roster(self):
         """
         Create new empty model and draw roster