X2AllowSelectAll Fixes

[BlackDog86]

Fixes #1486

Improves X2AllowSelectAllBehavior by:

1. Allowing the camera to pan to Non-XCom units being controlled by the player
2. Preventing the re-selection of the player's units when issuing commands to the non-player units
3. Preventing a softlock caused by ending the turn while X2AllowSelectAll is active
4. Forcing visibility between all units to improve the control / pathing of non XCom Units

Exclusion of civilians from the command and improved behaviour which breaks xcom concealment + scampers and alerts all aliens (breaking the patrol groups and allowing them to move normally) are also included as optional config flags.

Preliminary testing looks OK - more testing & comments on the code are appreciated.

[BlackDog86]

There is still a small visualizer hang when using a unit controlled by X2AllowSelectAll fires on an XCom Unit (this happens with the base game command as well) - I couldn't find the source of the issue but if anyone can figure out where that comes from it would also be helpful :)