0.2.21 - Fixes & Quality of Life (Geometrics Alpha) — Sprocket Steam update #139343

Hi all, Some fixes and quality of life features for the 0.2 alpha branch. Additions Paint job tint editing now supports HSV and hex. Pressing delete will now delete all selected objects (including mirrors, if symmetry is enabled). Fixes Addon structures are now mirrored correctly. You can no longer edit the mirrored copy. This shouldn't break any existing structures. Fixed powertrain parts being able to be selected through other objects if a powertrain part is currently selected. Fixed powertrain parts being selected if they're under the cursor when selecting the tracks. Fixed turrets not aiming correctly when rotated. Fixed northern map border being too far out. Fixed Dunes track trails not applying in certain areas. Fixed paintjob editing GUI not appearing if switching to the paint tab with a part selected. Destro...