Edit: Just released a patch that fixed the MSAA option not saving and a bug with roofs not being included with the default Copy setting

- added "free placement" mode, place any building block on any building block, this also ignores the Rust building 3.0+ restrictions
- Cancel Delete now allows for undoing the last 3 removals, this includes removing multiple parts at once, I'm slowly working towards a proper undo/redo system
- Options now includes an MSAA override (anti-aliasing setting) that uses the old default, the new temporal AA that Unity provides is not perfect
- Resource Count part list is minimized by default, added a close button at the top of the panel and removed the tier cost toggles
- any selected walls can be flipped in Edit mode with q / e
- Extend now works with floors
- using the remove key shortcuts in stability mode (when not in raid mode) actually removes now instead of just giving 0 stability