Assigning aSL to a specialist doesn't update the HUD icon.

## Testmerges
#8959: 'Speech bubble update' by Blundir at commit 42361441ef
#8569: 'SHARP Rifle Re-Revival: Triple R edition' by Blundir at commit e1d7c4a415
#7703: 'Hivelord Strain: Designer [Ver. 0.4]' by Venuska1117 at commit 296c576cf9
#7023: 'Research Rework Part Two: The Contract System.' by kiVts at commit 0c30b1b1ca

## Round ID
27255

## Description of the bug
Before the https://github.com/cmss13-devs/cmss13/pull/8771 merge specialists would get the big L HUD icon when assigned as aSL, like the rest of the squad roles do. It doesn't seem to work anymore.

## What's the difference with what should have happened?
Ideally specialists should be properly marked with the SL HUD icon when assigned as aSL.

## How do we reproduce this bug?
1) Assign aSL to a spec.
2) Look at their HUD icon.
3) There is no L.

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

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