Toggle status page date format between 24hr and 12hr

[Jamesbarford]

A little checkbox button allowing changing the date format between 24hr and 12hr;

24hr

12hr

Closes #2347

[Kobzol]

Thanks! Left some comments.

[Kobzol]

The dateFmt doesn't belong here, this is data loaded from the server. But we don't need to remember it and duplicate state, it's enough to just load the data from localstorage always (see my other comment).

[Jamesbarford]

Gotcha.

I think we need it in state to trick VUE.js into re-rendering the screen. Though I could be wrong, if we do need this wizardy I'll use another Ref<...> type as like you say I'm mixing some ui thing with something from the server.

[Jamesbarford]

c943210 I tried and it didn't work. So I split it out with a comment as to why

[Kobzol]

Hmm, it worked for me when I tried it locally before. The component should re-render when the event is triggered, I think. I'll check.