Buildmode Copy tool not placing atoms correctly

### Testmerges

None

### Round ID

None (Local)

### Description of the bug

The Copy tool places copies of the atom on the original tile, no matter where you click.
(Note: Also occurring on PvE!)

### What's the difference with what should have happened?

Should be creating copies of the atom on tiles you click.

### How do we reproduce this bug?

1. Boot up a round
2. Open Buildmode
3. Copy Tool
4. Select an atom as template
5. Try to place new atoms
6. Check the original tile

https://github.com/user-attachments/assets/85a47487-a54b-43c1-8da1-c1a3671c3867

...

### Issue Bingo

- [x] Issue could be reproduced at least once
- [x] Issue happened in a recent (less than 7 days ago) round
- [x] Couldn't find an existing issue about this (https://github.com/cmss13-devs/cmss13/issues)