Video list filters labelling, button and sort select UI improvements

[rigelk]

Description

Displays labels for languages and categories instead of the raw ids. Changes radio buttons to checkboxes for scope selection. Clearer sort selection with description and grouping by type of sort. Rely on peertube-checkbox whenever possible for uniformity of style and conciseness.

This PR might be improved by applying the same treatement as scope radio buttons to the type of video (live/vod) radio buttons.

Screenshots