Added cinderblock wall, wall with 3 ports, Miixed target type, 8" target

New Stuff

• Added wall with 3 ports and flap
• Added 3m x 2.5m cinder block wall
• Added MIXED target type in WSB
• Added 8" diameter cardboard target
• Mission160 Scanned Bays 2,3,4,5,8,9,10

Bug Fixes

• Fixed texture of Basic Bay 100x100 and 50x50
• Refactored Swinger angle calculations
• uspsa-steel-plate & ipsc-steel-plate now has editable text
• Handled missing Scanned Bay properly
• Fixed rulers and faultlines drawing under some scanned bays