Fixes #9322

Fixes #9393

Fixes #9386

Fixes #9385

Many messengers dont show the status anymore, its not evident to new
users that most of their roster is hidden per default and they have to
show it to access the contacts

Plugins can import _() from plugins_i18n

- Dont load plugins without short_name
- Check with the short_name if a plugin is already loaded

- Fix wrong chatstates issued because of textview changed signal
- Fix chatstates in PMs

and switch to yaml format to improve readability