Add the reset button to quick shortcuts

[kubalav]

This PR adds a button that resets the video playback speed to the speed 1x. On desktop, users can do this using a keyboard shortcut, but mobile and tablet users don’t have access to that option. This button ensures the same functionality is available across all devices.

Before:

After:

[igrigorik]

but mobile and tablet users don’t have access to that option

Which browser on mobile are you using that allows you to use the extension?

[kubalav]

Which browser on mobile are you using that allows you to use the extension?

Kiwi Browser, Quetta and Lemur Browser.