UI: Add a UTC and local clock

[JohannesFerner]

Feature request

What problem does this feature solve?

Our international and local customers are sometimes bugged by having a UTC time on incidents and other messages. which shouldn't be a problem
In order to make it clear for everyone an (optional) display of a JS powered UTC and local-clock would solve close to weekly discussions about "wrong time on statuspage", "why're you reporting earlier / later ..." and the like.

What does the proposed API look like?

How should this be implemented in your opinion?

• new Date().toUTCString() and new Date() formatted to the default of statusfy.

Are you willing to work on this yourself?**

We'll add it to our Backlog.
If anyone wants to tackle this one before we do - please go ahed.