(small) Patch 1.8.5 - misc fixes

Hi y'all! Another day, another patch 😄

• Fix crash when merging two walls whose points already share same position thus resulting in duplicate points and failing an internal assertion check

• Fix brackets gap in half-timbered jettying

• Fix audio not playing when adjusting wall or fence height when it's fully covered in arches

• Don't offer continue wall gizmo if in fence mode and vice versa

• Disable "Try new glade?" first-time menu in favor of classic main menu since it was confusing people

• Experimental camera keyframe controls: fix F8 not working. Turns out we were filtering it out as a developer hotkey. Oops! My bad ^^"

Thank you for reading and have a good day!

Love, Ana & Tom