RNG feature

I've just finished new feature - dice roll. I think the name says it all. You can "roll a dice" and get a random number and if the number is bound to timestamp where you should go it will take you there automatically.

So far only one video has this, you can try it yourself: https://www.the-joi-database.com/watch/a8d61587acc31cf1b32c5884

I also implemented a fix for the site where arrow keys often does not skip through the video so with the extension the skipping now works as expected.