Support test - Overhang and Straight

A test for support with both an overhang and a straight section. 

Make sure to turn off "Don't support bridges" in Orcaslicer or the relevent setting in your own slicer to enable support under the straight / bridge section.

Test multiple support configurations at a time by cloning it and then editing per object settings.

Added a straight section to the Island test instead of just being an arc.