Selecting vertices from multiple bsp brushes move in relative space and cannot be changed to world space

BSP brushes only move in relative space instead of world space if the user has selected vertices from more than one bsp brush. User cannot change translation to worldspace instead of local space.

1. Open Editor (any project)
2. Create 2 box brushes
3. Open edit mode
4. Rotate one box 90 degrees (to see example clearly)
5. Select one vertex from each box
6. Use arrow keys to move left and right

4.7 preview 3 Moving vertices uses local translation when editing multiple brushes