Rename CONTENTS_SENSOR back to CONTENTS_TRIGGER
Rename CONTENTS_SENSOR back to CONTENTS_TRIGGER

Simplifying surfaceflags/contents compatibility with other games porting to daemon.
This reverts e5acd1ad8806b496ff2527bd0d5ef253d9fa531c.

DaemonEngine/Daemon,DaemonEngine/Daemon,DaemonEngine/Daemon,DaemonEngine/Daemon