1.611 Update - minicopter, satchels and sedan rocket booster

- added the minicopter

- less workshop list loading, data gets retrieved when the program starts and doesn't need refreshing when switching to/from published

- door open/closing no longer works in edit mode

- moved the height limit option to the top panel

Stability mode changes:

- added the satchel

- corrected building block damage with metal and armor building blocks

- window parts are included

- added a sedan rocket booster - press B after launching

Disabling the height limit and using steps to make a ramp works well with the new booster.