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This will help to better track the various states a MUC is in and to act on it

Fixes PyGIDeprecationWarning: GObject.GError is deprecated
and button initialization, see: https://wiki.gnome.org/action/show/Projects/PyGObject/
InitializerDeprecations?action=show&redirect=PyGObject%2FInitializerDeprecations

Relax refactor warnings

ellipsize is set in MaxWidthComboBoxText

This adds the following queries for room infos:
is_open, is_password_protected, and is_persistent

This adds the correct TargetList to our drag destination. Dropping a
contact on the group chat's roster will send an invite.

Fixes #9733

This adds a query to determine whether a MUC is semi-anonymous or
non-anonymous.

Currently, detecting a file drop on the roster window is not recognized
correctly. This fix avoids an Index error thrown after dropping a file
on the roster by checking if there is a selection before continuing.

Determine if we add a receipt mark inisde ConversationsTextview instead of in the ChatControl

graphics was always True, we only use it in add_info_message()

This helps to prevent confusion because there exist XEP-0359 stanza-ids which are not used here

Same code exists in the ChatControlBase.add_message() method already

The timestamp should be enough indication of how recent the message is