Enable clickable link in YouTube Shorts comments - #96

[adsuth]

Changed the names of the intervals to be a bit more generic.
Added a new "low priority" interval that fires every second.
That interval currently handles the new "returning links" implementation.

Essentially, just replaces any text-based link with an <a> tag link that can be clicked.

Handles HTTP, FTP and WWW links, as well as those without (eg: "youtube.com", it'll just affix "http://" to the start)

A link is selected via regex, specifically, this: /[^\s]+\.[^\s]{2,}/g
Any collection of non-space characters that is contiguous with a period, and then has two or more non-space characters thereafter is considered a link.

There will be issues with this; if a comment has, for example "this isn.ta link", it'll register http://isn.ta as a link. These can be ignored mind you.

(this will likely only work with first level comments, not replies)

For #96