Update #21 - Improvements to Workshop Importer

Improvements and bugfixes related to workshop importer/uploader.

• Fixed issue with previews uploaded to workshop sometimes showing all puzzles in solved state.
  
• After importing puzzle there are now 2 previews displayed to show both solved and unsolved state.
  
• .vox importer now handles Flip X/Y/Z operations.
  
• Changes made to puzzle size will no longer require game restart to display properly in preview.