added an extensible list of strings that may prefix a given extension
that becomes part of the extension. tar is the only one right now but
more can be trivially added

resolves #1230

Some themes set a background colour on the member list, which ended up
blocking the count due its negative margin. All I did was remove the
margin.

did essentially a whole rewrite of the Uwuifier to operate word-wise
instead of upon the entire message using regexes. Also retains
capitalization now, which may or may not actually be wanted.

As a result of word-wise operations, it can now avoid uwuifying certain
patterns, currently only does so for URLS

resolves #1186

Removed the accidental zIndex