[Feature Improvement] Radio Refactor Pt 2 - Quality of Life Improvements

[dgibso29]

• 🔴 try to preserve radio spatialization, PTT slot, volume
• 🔴 mp test
• 🔴 make map list scale with zoom
• 🔴 update map list as groups change
• 🔴 mp test
• 🔴 if hotline zeus exists, add disclaimer about availability (can't hear while RCing for example)
• 🔴 if someone broadcasts on hotline zeus and no zeuses are available, tell caller to wait
• 🔴 when someone switches onto hotline zeus, notify of current zeus availability
• 🔴 when zeus is available, notify all non-zeuses tuned into hotline zeus

[Bubbus]

These are stretch goals on the back of #133. IMO "Hotline Zeus" should be axed as it's barely used these days and players have become more accustomed to pinging for problems. Maybe replace with a standard disclaimer of "ping if shits fucked or shits unfun".

[dgibso29]

Agree, we had a disclaimer in our collabs for a while that feels like a decent fit.