[omemo] Adapt to Gajim changes

omemo/gtk/config.py

@@ -171,7 +171,7 @@ class OMEMOConfigDialog(GajimPluginConfigDialog):
     def cleardevice_button_clicked_cb(self, button, *args):
         active = self._ui.get_object('account_combobox').get_active()
         account = self.account_store[active][0]
-        self.plugin.connections[account].publish_own_devices_list(new=True)
+        app.connections[account].get_module('OMEMO').publish_own_devices_list(new=True)
         self.update_context_list()
 
     def refresh_button_clicked_cb(self, button, *args):

omemo/gtk/key.py

@@ -60,7 +60,7 @@ class KeyDialog(Gtk.Dialog):
         self._windowinstances = windowinstances
         self._account = self._contact.account.name
         self._plugin = plugin
-        self._con = plugin.connections[self._account]
+        self._con = app.connections[self._account].get_module('OMEMO')
         self.omemostate = self._plugin.get_omemo(self._account)
         self._own_jid = app.get_jid_from_account(self._account)