Some polish and small fixes

Tutorial
- Made material of walls darker, in an attempt to make the Text-hints during the tutorial more friendly to read.

Thing In Well
- Will now occasionally switch locations if it is active in the overworld.

UI
- Added zone name-flash when entering a ruin or the lab.
- Moved the radio hints UI when holding it from on-screen to be part of the model instead.
- Clarified what performance mode actually is under options.