Give control windows some layout/styling love

[kmeesters]

Easier to use/ use friendly GUI for control windows:

• separate clock start/arm (most used)
• show hotkeys (small text next to button?)
• bootstrap style?
• aligned/ justified buttons
• separate message editor

Idea: perhaps tabbed? (Each module new page, like setting in scoring)?

[rikkertkoppes]

Not sure about tabs, it should really be a power user interface, where everything is quickly accessible. I think using tabs increases search time.

Also, I'd like to keep it as FLL-agnostic as possible, so separating clock should not be hardcoded (maybe configurable)

Ideas / mocks to make this more fancy are welkcome