PrusaSlicer-n8 2.4.0-beta3 - Cyberpunk 2022: yes again lol

Parity release with PrusaSlicer, to bring this up to beta3.

I did change something I missed: support material interfaces, which had sheath enabled, incorrectly used the "stable" zig-zag pattern. I missed the prusa change that did the same for normal sheathed sparse/base support. Sheathed interfaces now use the plain zig-zag pattern, which has multiple benefits:

• The plain zig-zag aka officially ipRectilinear interrupts itself less. It's a more consistent zig zag back and forth. The stable zig-zag, aka officially ipSupportBase, likes to stop and start multiple times, making Z-like shapes repeatedly within one island.
• If retraction within support islands is enabled, this could lead to lots of silly retractions and blobs put where the ipSupportBase algorithm seems to generate small "stems" at the end of linked lines. This can still happen if you use Rectilinear interface pattern with a spacing less than 95%, and you enable support island retractions. So, watch out for that.

Linux AppImage once again provided by @P-C-R