Bugfix, ghost, quality of life updates

Gameplay improvements:

• Automatically saves the selected VR locomotion scheme and laser pointer sensitivity.

• Added option to show "ghost" where we're about to play.

• When clicking on dead stones, game now removes entire group at once if stone touches others.

• Added VR locomotion option: "none" (for 1:1 locomotion only).

Bugfix:

• Fix visual bugs on undo (redo capture animation and close play menu)