Jeremiah 1499fcd272 Tgui input checkboxes (#74544) ...

## About The Pull Request
A request from @NamelessFairy: A tgui window that gives the user
multiple items to select. The window returns the list of items selected.

The ui design is open to critique, reviews, etc. Pretty simplistic.
![Screenshot 2023-04-07
174056](https://user-images.githubusercontent.com/42397676/230695947-bc6b6d94-c984-4a2e-b290-a21cb7f8961e.png)

## Why It's Good For The Game
Sequentially asking yes/no is pretty ugly
## Changelog
🆑
ui: Adds a new tgui input window for checkboxes.
/🆑

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Co-authored-by: Jeremiah <jlsnow301@pm.me>

2023-04-13 05:35:28 -04:00

..

say_modal

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alert.dm

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checkboxes.dm

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list.dm

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number.dm

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text.dm

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