You can unload rockets from M5 RPG with in equipped

## Testmerges
#10999: 'Fix of various plane related issues' by Blundir at commit f85a7153c4
#11661: 'Despoiler rework' by Git-Nivrak at commit c0f8d2884f
#11724: 'Point Blank Refactor [EXPERIMENTAL]' by TrollerNoob at commit 466ad883dc
#11680: 'Don't qdel tgui windows' by Drulikar at commit 0499627b55
#11555: 'Adds tethering to some storage items' by Nihisohel at commit 17401339ec

## Round ID
32693

## Description of the bug
You can unload rockets from M5 RPG with in equipped

## What's the difference with what should have happened?
need to hold the RPG to unload it

## How do we reproduce this bug?
1) have a loaded RPG and start to unload it
2) put it away before you unload it
3) the attraction keeps going making you unload it

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

## Additional details
- Author: SeedyJatz
- Admin: SeedyJatz
- Note: None

Reproduce the issue using the listed steps with a loaded M5 RPG, then trace the unload interaction from the RPG and equipped-item handling. Done means unloading stops when the RPG is put away and continues only while the RPG is held; verify the behavior in a comparable test scenario.

Written by the indexing model from the issue text.