Weapons in the right most slot of their holster overlap with the 'close' arrow.

## Testmerges
#8959: 'Speech bubble update' by Blundir at commit 42361441ef
#7703: 'Hivelord Strain: Designer [Ver. 0.7]' by Venuska1117 at commit 92fa8dcbdb
#9034: 'lurker rework, Pounce changes, invis decreased on pounce/damage' by private-tristan at commit 40dc09330f
#9040: 'New In_hands and On_mobs (IDs, Backpacks, Belts, Swords and Knives)' by LC4492 at commit 2c99170d79
#9144: 'disables cade building after alamo smacks into almayer (HIJACK)' by psyendrocronologicalwarfare at commit 75f04f9f8f
#7023: 'Research Rework Part Two: The Contract System.' by kiVts at commit a6e9f47cfc
#9141: 'Shield Code backend rewrite.' by realforest2001 at commit cfe08af9df
#8569: 'SHARP Rifle Re-Revival: Triple R edition' by Blundir at commit 7e47146977

## Round ID
27576

## Description of the bug
So far observed this with XM51, M39 and their respective holster rigs. When the weapon is placed in the right most slot of the holster, its 'clickable' area (not the actual sprite) overlaps the 'close' arrow entirely and then far more.

## What's the difference with what should have happened?
It should not make the 'close' button unusable by overlapping it with invisible clickable area.

## How do we reproduce this bug?
1) Grab M276 pattern M39 holster rig (also works with the XM51 holster to some extent, most observable with the M39 though).
2) Put two magazines in, put M39 in so it's in the right most slot.
3) Try clicking the 'close' inventory button, discover that M39 click area protrudes far beyond, fail miserably.

## Attached logs
```
N/A
```

## Additional details
- Author: Nettle
- Admin: SmellyHippie
- Note: None