Extension should disable roon radio on the zone when in slave mode

[nugget]

When slaving off a master, the local zone should disable roon radio so that they aren't competing for the next track when the current track finishes.

Flip the auto_radio attribute of the zone somehow.

<- CONTINUE 2 Changed {"zones_changed":[{"zone_id":"1601fa13b47e4ae20588acf651c74e9a6302","display_name":"Office","outputs":[{"output_id":"1701fa13b47e4ae20588acf651c74e9a6302","zone_id":"1601fa13b47e4ae20588acf651c74e9a6302","can_group_with_output_ids":["1701fa13b47e4ae20588acf651c74e9a6302","1701b6d37bae0efdaf8c35f7e9483ba6f5fd","1701bffdbdb0615b297e24788d379c14e4d9"],"display_name":"Office","volume":{"type":"number","min":0,"max":100,"value":100,"step":1,"is_muted":false,"hard_limit_min":0,"hard_limit_max":100,"soft_limit":100},"source_controls":[{"control_key":"1","display_name":"D90 ","supports_standby":false,"status":"indeterminate"}]}],"state":"stopped","is_next_allowed":false,"is_previous_allowed":true,"is_pause_allowed":false,"is_play_allowed":false,"is_seek_allowed":false,"queue_items_remaining":0,"queue_time_remaining":0,"settings":{"loop":"disabled","shuffle":false,"auto_radio":false}}]}

[nugget]

As I think about this more I think it should be an option. Users might prefer either behavior.