Sneaks an extra tile into Almayer squad preps by using fancy density …

…and offsetting magic (#3847)

# About the pull request

Title basically explains it

Some "issues"

downwards-facing prep rooms have a bit of a weird perspective thing
going on but they already had those anyway so????

some items spawn on the floor below your sprite instead of on the vendor
(because of where the vendor actually is) I dont think this is much of
an issue to be honest it might be slightly confusing for all of 3
seconds

video to follow 
https://streamable.com/mf2bs2

# Explain why it's good for the game

It allows players who are prepping in the main hall of squad prep to
indent themselves so that they're not pushed by people who're just
running down the hall


# Testing Photographs and Procedure
<details>
<summary>Screenshots & Videos</summary>

Put screenshots and videos here with an empty line between the
screenshots and the `<details>` tags.

</details>


# Changelog
:cl: SpartanBobby
maptweaks: edits Almayer squad preps to allow for more space
/:cl: