Small bug fixes

Thanks again to Catlover1273 for the bug reports.

• Fixed a bug which caused problems pretty much everywhere in the release build, including problems with nails, spikes, and breaking joints.
• Fixed: Hand tool not activated properly on reset if it is primary
• Fixed: Shift delete would play squish sound and clear all nails even if another tool was selected.
• All spikes can now also be cleared with Shift + delete
• Possibly fixed a bug causing body parts to get stuck after a spike is removed.