fullscreen button does not work

[MonkestationIssueBot]

Reporting client info: Client Information:
BYOND:516.1659
Key:somerandomsandwich

Round ID:

10195

Testmerges:

• Lead Poisoning Station: A bizarro station for use on monke
• Custom Command Report Updates!
• [Code Bounty] Adds a lot of possible chromosomes to existing mutations + adds some mutations from beestation/TGstation
• really quick bandaid patch to make custom area lighting work
• Research pass, expierments, and deconstructive analysis
• quick fix to allow mentors and admins through interview
• [Mirror/Ports] Research queue
• Gives teratomas the captain's car keys (uncommon teratoma spawn event + other misc teratoma stuff)
• Interaction component fixes + improvements
• monsterhunter trick weapon code improvements
• mrrrp mrrrp mrrrow (what the hell is atomization)
• Fix lights sometimes not properly updating when turned on/off

Reproduction:

not sure if it's actually related to the PRs and such, but upon pressing the fullscreen button, all it does is push the UI elements a bit closer together and automatically refresh the game position like the "Fit Viewport" button, without doing anything else beside getting rid of the "Help" verbs and such at the top left of the window