Xeno update icon fixes

[Drulikar]

About the pull request

This PR does a few things:

• Removes duplicate update_wounds calls (update_icons itself will call update_wounds)
• Simplifies some logic for acid_overlay (namely just an in check that could be done w/ |= instead)
• Removes some calls to xeno update_icons that seemed pointless
• Simplifies some calls previously to xeno update_icons that merely wanted the behavior delegate on_update_icons logic
• Fixes the FIX ME icon state for designer choose design ability due to unnecessary logic adding extra overlays
• Fixes charger strain not even calling stop_momentum if you simply stop moving. Very goofy to charge, stand still, and then turn/move and suddenly you skid to a halt and finally raise your head. 0.5 seconds is just copied from existing logic so it probably is too lenient (especially since this is checking on Life interval); but also most of the behavior logic shoved into the button ought to be refactored into the behavior delegate instead.

Explain why it's good for the game

• Hopefully less self cpu time for /mob/living/carbon/xenomorph/update_icons
• Fixed goofiness with charger
• Fixed this

Testing Photographs and Procedure

Screenshots & Videos

https://youtu.be/lR9WlbwenNE

Changelog

🆑 Drathek
code: Removed/simplified some unnecessary calls to xeno update_icons
fix: Fixed designer button saying FIX ME when first selecting the strain
fix: Fixed charger crusher not ever stopping a charge if you simply stop moving
/:cl:

[cm13-github]

Test merge deployment history:

Test Merge Deployed @ 05/20/2026 07:24:34 +00:00:

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Origin: 03d45a3
Pull Request: 431ccbe
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Pull Request: 431ccbe
Server: 3280e9154949182c4e51ee27602a16ed75001565

Test Merge Updated @ 05/20/2026 22:56:32 +00:00:

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Pull Request: 431ccbe
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Pull Request: 431ccbe
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Pull Request: 431ccbe
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Pull Request: 431ccbe
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Pull Request: 431ccbe
Server: 42ff026

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Pull Request: 431ccbe
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Pull Request: 431ccbe
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Pull Request: 431ccbe
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Pull Request: 431ccbe
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Test Merge Updated @ 05/23/2026 03:50:39 +00:00:

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Pull Request: 431ccbe
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Test Merge Updated @ 05/23/2026 16:14:49 +00:00:

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Pull Request: 431ccbe
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Test Merge Updated @ 05/23/2026 16:25:09 +00:00:

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Pull Request: 431ccbe
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