Add toggle to use 24h time

[zusorio]

This adds a toggle to use 24-hour time to the timezone selector. It also

• Uses the formatTime helper in more places
• Modifies that helper to accept an object instead of several parameters
• Swaps the timezone selector to use bootstrap form elements
• Swaps the CET timezone from Europe/Paris to Europe/Berlin

[slmnio]

I like the concept, and I think it works in the modal well. It doesn't seem to flow amazingly in the events/match page as it pushes down the rest of the content.

[zusorio]

It doesn't seem to flow amazingly in the events/match page as it pushes down the rest of the content.

I can add a prop to the component to display the toggle inline or just hide it completely on those pages