[QoL] Show field effects when pressing C (weather, screens, hazards)

[jaimefd]

I've noticed it's hard to tell when weather effects are going on, or to check if your stealth rocks/spikes/screens are still in effect between waves.

It would be great to have some way to check what field effects are active, and if limited see the remaining turns, as a toggle mid battle similar to how we can view stat boosts with C.