Feature Request: Pin timezone in world clock

[Der-Flip]

I think a great addition to the world clock (besides of #21) would be to pin a time zone to the top of the list as seen in this quick mock-up?

[qw123wh]

This is a consequence of #21

[Der-Flip]

I just used UTC here, it could be any city / timezone (PST, ET, EAST etc), but yes, it is somewhat tied to it.