better presentation for register new account

- error message when no user, pass or server given
- server is now automatically updated when jid change in connection category

frontends/wix/main_window.py

@@ -306,6 +306,7 @@ class MainWindow(wx.Frame, QuickApp):
         if type == "SUPPRESS":
             self.current_action_ids.remove(id)
         elif type == "SUCCESS":
+            self.current_action_ids.remove(id)
             dlg = wx.MessageDialog(self, data["message"],
                                    'Success',
                                    wx.OK | wx.ICON_INFORMATION
@@ -313,6 +314,7 @@ class MainWindow(wx.Frame, QuickApp):
             dlg.ShowModal()
             dlg.Destroy()
         elif type == "ERROR":
+            self.current_action_ids.remove(id)
             dlg = wx.MessageDialog(self, data["message"],
                                    'Error',
                                    wx.OK | wx.ICON_ERROR