- Rename some methods more appropriate
- Move some methods to more appropriate places
- Dont emit GTK events to signal GTK, use GLib.idle_add
- Remove option to set the plugin repo URL, use global vars instead

- Move UI code to glade file
- Remove use of deprecated widgets
- Rename some widgets

- Remove Server URL entry field
- Dont use deprecated widgets anymore

This inlcudes slight refactoring and switch to https instead of ftps

Cherry pick mpris-bugfix branch from master and fix imports in listen now.

See merge request !17

Port recent changes to OMEMO

See merge request !16

[anti_spam] v1.4.3 more in CHANGELOG

Remade for GTK3

See merge request !3