[MIRROR] RTS-like xeno control

[Danilcus-W]

About the pull request

Strongly WIP, meant to gather some suggestions and criticism before merge.
Afterall, this is QoL for our dear game masters, not for me

Explain why it's good for the game

From what i've seen on actual OPs, GM panel lacks 2 main things that gamemasters sometimes forced to do through sheer improvisation:

1. Ability to command xenos to move somewhere, preferrably in controlled groups
2. Somehow automatically remove capture human orders, because if you just leave it be - in a situation where tagged marine might already be saved and patched up, the "STEAL THAT GUY" mark still remains, forcing some xenos to focus our poor guy.

While fooling around these, i did some other QoL changes that might be neat or useful

Controls

• LMB - select/de-select xeno
• LMB+DRAG - select xenos with a selection box
• LMB+SHIFT - select additional xenos (will not deselect everyone when clicked elsewhere)
• LMB+DRAG+SHIFT - select additional xenos with a selection box
• LMB+ALT - select all xenos on current z-lvl
  ===========================
• RMB - order selected xenos to move once
• RMB+CTRL - place a behavior override order (if some xenos are selected - only they will be the assigned)
• RMB+SHIFT - place additional move points (they will patrol between em if amount is more than one, else it's just a move order)

Testing Photographs and Procedure

Screenshots & Videos

Put screenshots and videos here with an empty line between the screenshots and the <details> tags.

Changelog

🆑
add: Massive click-behavior overhaul
/:cl:

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