Bug Fixes and Minor Adjustments

• Changed order/invoice “update prices” to bring in current price level from customer if the preference is turned on.
• P10: Cleaned up inventory item class editor, and several small changes to inventory screen.
• P10: Changed report previewing to no longer use dialog windows. 
• P10: Several batch production fixes.
• P10: Added ability to assign several builds to a batch at once by checking them off and right clicking the desired batch.
• P10: Fixed to disallow edits on posted builds (when user has build in edit mode while another user posts it).