GroupchatSettings: Use JID instead of string

gajim/gtk/controls/groupchat.py

@@ -459,7 +459,7 @@ def _on_groupchat_settings(self, _action, _param):
             self._groupchat_settings_box.destroy()
 
         self._groupchat_settings_box = GroupChatSettings(
-            self.account, self.room_jid)
+            self.account, self.contact.jid)
         self._groupchat_settings_box.show_all()
         self.xml.settings_scrolled_box.add(self._groupchat_settings_box)
         self._show_page('muc-settings')

gajim/gtk/groupchat_settings.py

@@ -13,6 +13,7 @@
 # along with Gajim. If not, see <http://www.gnu.org/licenses/>.
 
 from gi.repository import Gtk
+from nbxmpp.protocol import JID
 
 from gajim.common.const import THRESHOLD_OPTIONS
 from gajim.common.i18n import _
@@ -24,7 +25,7 @@
 
 
 class GroupChatSettings(SettingsBox):
-    def __init__(self, account: str, jid: str) -> None:
+    def __init__(self, account: str, jid: JID) -> None:
         SettingsBox.__init__(self, account, jid)
 
         self.get_style_context().add_class('settings-border')