GearBlocks Demo 0.7.8563 — GearBlocks Steam update #978403

Hey everyone, quite a few fixes and improvements have accumulated since the last demo update, so I decided it was worth releasing another one. Release notes:- Many optimisations to UI, overlays, and indicators. Improves performance especially with a large number of parts / constructions. Minor tweaks to builder tool:- Click and drag "threshold" now only applies to move manipulator. Prevented dragging the part selection's pivot point below ground. Increased targeting distance. Removed "Prevent Interpenetration When Attaching Parts" toggle from "advanced options" (still available in the demo by setting "PartPenetrationTestEnabled" to false in the debug console). Added toggle to "advanced options" to disable the centre of mass indicator. Modified control wheel part behaviour to check for player distance and facing direction. Added option to light part behaviour settings for disabling shadow...