TGUI Latejoin Menu! (#71531)

## About The Pull Request

Converts the latejoin menu to TGUI, and makes it give reasons for why a
job is unavailable instead of hiding it!

<details>
<summary>Cool Images!</summary>

<image
src=https://user-images.githubusercontent.com/106692773/205135570-c8b788f1-1ff0-4e6d-b53d-e2119317c37b.png>
<image
src=https://user-images.githubusercontent.com/106692773/205135598-2ac9e138-37dc-4baf-ae33-deb0990616cd.png>
<image
src=https://user-images.githubusercontent.com/106692773/205135609-ae6b840b-40b5-4248-bd30-5fdadd6582f2.png>
<image
src=https://user-images.githubusercontent.com/106692773/205135615-d8997834-f433-48ee-8763-274e306b521b.png>



</details>

## Why It's Good For The Game

TGUI menu good, yes?
## Changelog
🆑 RimiNosha
qol: The latejoin menu is now TGUI!
qol: You'll also be able to see why you can't join a job, instead of it
being invisible!
code: Department UI colors have changed slightly. This will only affect
the latejoin and nations UIs.
/🆑

Co-authored-by: Mothblocks <35135081+Mothblocks@users.noreply.github.com>
Co-authored-by: Aleksej Komarov <stylemistake@gmail.com>

code/modules/modular_computers/file_system/programs/bounty_board.dm

@@ -30,7 +30,7 @@
 			data["user"]["department"] = current_user.account_job.paycheck_department
 		else
 			data["user"]["job"] = "No Job"
-			data["user"]["department"] = "No Department"
+			data["user"]["department"] = DEPARTMENT_UNASSIGNED
 	else
 		data["user"] = list()
 		data["user"]["name"] = user.name