Facelift for token game

[0xUnicorn]

After rewriting most of the token game before last years event, different issues showed up when going in production, so we need a facelift before this years event.

This is an issue for managing these tasks.

• TokenCategory list and detail views show tokens from all camps and not only for the current camp.
• Last join and Latest find should have a default value when None.
• When no tokens has been created show a Token game has not started yet, check back later message.
• Not all widgets scale well for different viewports.
• Text color not adjusting for white color scheme on Total players and Total finds widgets.
• Improve the fix from: a8ef129 and add tests.
• Add link for token game on primary menu a week before and after the event
• Add 'random token generator' for auto generating new token string when creating tokens