Repair Bug Fixes - v0.7.0.64

Couple of fixes with repairing. 1) Workers that were blocked from a repair job, didn't refund metal cost, and if it was a user scheduled repair the fix wasn't rescheduled. 2) Repairs could be made on items/tiles that were in construction. Now restricted.

Patch notes:-

• Blocked repair jobs now refunded if a routine repair.
  
• Blocked scheduled repair job, now reassigned to fix list until path clear.
  
• Repairs restricted on in construction items/tiles.
  

Nick