tilt turn window, opening limiter / restrictor

This is another useful limiter for tilt turn windows.
Works fine with 2.9mm screws.

Kippfenster Begrenzer

modification 2017_11_20:
- KippfensterBegrenzerMountRahmen_RevA (more stable)
- KippfensterBegrenzerVerbinder (chamfer was missing in old version)