Draft: Simple cam lock-on improvements

Adds several improvements to the lock-on targeting function for Simple controls.

• Bosses can be targeted even if out of sight
• Camera will not lose focus on bosses in their flashing state
• Allowed lock-on in ringslinger modes if chasecam is enabled
• Camera can lock onto players depending on targeting settings, gametype rule conditions, and team affiliation / tagged status
• Allowed targeting of CTF flags if targeting mode is set to "Bosses" or "Interests"
• If camera is in "locked" state but without a valid target to latch onto, camera will automatically seek a new target if in view
• Prevents camera from locking onto spurious object IDs during map load