1.628 Update - modular cars and lift

- added the 3 sizes of modular cars, will probably be doing more with this eventually

- added modular car lift in the electric parts panel

- updated models for external wooden gate and wall

- fixed a bug in edit mode where you could only delete if not moused over a part

The place panel is getting a bit long to sift through. It might be time to have more sections like electric parts. Any suggestions for this, modular cars or anything else is always welcome.