Display a notification when the PeerTube service started so that the
user is aware that the add-on can be used.
This notification will be useful especially on slow devices.
The notification can be disabled in the settings.
* Turn the name of the main category of the settings into a localized
string
* Add separators to group settings per theme
* Make some settings name more explicit
* Translate the possible values of the settings video_filter and
video_sort_method
See merge request StCyr/plugin.video.peertube!20 for more information