New userstyle for making tagsets more legible

[zaluzianskya]

Here! It highlights a tag when you hover over it, which makes it a bit easier to parse individual tags in the huge sea that is tagset listboxes. Highlight and text color settings are customizable.

And another, since this is still the topmost post: This one changes the comma between tags to something more legible. The default is a large bullet, but I included some other options too.