[banner_tweaks] Missing message_control import

Versions

• OS: Manjaro
• Gajim version: 1.1.92
• Plugin version: 1.2.1
• GTK version: 3.24.12
• Python-nbxmpp version: 0.9.92

Steps to reproduce the problem

1. Run Gajim with Banner Tweaks plugin activated

Expected behavior

Plugin loads

Actual behavior

Traceback (most recent call last):
  File "/mnt/Daten/Daten/Projekte/DEV/Gajim/gajim/gajim/plugins/pluginmanager.py", line 675, in scan_dir_for_plugins
    module = __import__(module_name)
  File "/home/x/.local/share/gajim/plugins/banner_tweaks/__init__.py", line 1, in <module>
    from .plugin import BannerTweaksPlugin
  File "/home/x/.local/share/gajim/plugins/banner_tweaks/plugin.py", line 34, in <module>
    from gajim import message_control
ImportError: cannot import name 'message_control' from 'gajim' (/mnt/Daten/Daten/Projekte/DEV/Gajim/gajim/gajim/__init__.py)