ETH improvements

Video Player features:

Improves the video player that is used for lecture recordings by adding new controls:
-up arrow increases speed by 0.25x, up to 2x
-down arrow decreases speed by 0.25x, minimum is 1x


Mystudies and Moodle features:

Clicks on pointless buttons telling you to login (optional)
Automatically switches to English (optional)
Improves the layout of Moodle



You can toggle those features above by clicking on the extension's icon