spectator option + fix send event

Fixes:

• The Sending event's final allow value is no longer ignored

Additions:

• Added a config option AudibleToSpectators - setting it to false will prevent spectators from hearing Proximity Chat

Changes (non-breaking):

• Upon sending a Proximity Chat message, the CurrentChannel on the voice module is set to Proximity
• Changed to the ResyncToOwner method provided by SecretAPI