Autofit viewport does not occur on toggle full screen

## Testmerges
#6334: 'Xenomorph Endgame' by Git-Nivrak at commit 18cfcab3cd
#6400: 'Adds Sunsets to Roundstart, adds Sunrises to Marine Victories, and Survs can hear Evo Announcement Screeches now' by GrrrKitten at commit 2927345720
#6308: 'Hostile Survivor Rework' by Steelpoint at commit bf51f9e551
#6039: 'Project ARES TM Holder (v5)' by realforest2001 at commit 370c1d53f8
#6248: 'New Map: LV-759 Hybrisa Prospera' by Zenith00000 at commit d874f97e11
#6594: 'Ports "Adds a Chat Reliability Layer"' by Git-Nivrak at commit 9b0717ad64
#6568: 'Chemical simulator TGUI' by kiVts at commit 5280d571c9

## Round ID
22969

## Description of the bug
When toggling full screen preference with autofit viewport enabled the viewport is not automatically fitted. When toggling autofit viewport afterwards it is resized correctly.

## What's the difference with what should have happened?
Should have resized the viewport.

## How do we reproduce this bug?
Identical to the description

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

## Additional details
- Author: Trailblazer123
- Admin: SmellyHippie
- Note: None