Separate most Twitter features in their own controller so it might be easier to implement those in the handler

src/controller/buffers/twitter/list.py

@@ -1,13 +1,8 @@
 # -*- coding: utf-8 -*-
-import platform
-if platform.system() == "Windows":
-    from wxUI import dialogs, commonMessageDialogs
-elif platform.system() == "Linux":
-    from gi.repository import Gtk
-    from gtkUI import dialogs, commonMessageDialogs
 import widgetUtils
 import logging
 from tweepy.cursor import Cursor
+from wxUI import dialogs, commonMessageDialogs
 from . import base
 
 log = logging.getLogger("controller.buffers.twitter.listBuffer")