Draft: Add a Right to Left touch rect mode for CAD users

This method of selection takes the selection mode from the direction of the rectangle. If it's left to right objects must be entirely inside to be selected, if it's right to left objects only have to be partially inside to be selected.

• Added new rubber band mode "EITHERECT" which decides based on start and end positions
• Added select tool preference, default to false
• Hide selection toolbar touch button when enabled

NOTES:

1. Speculative code: This has not been compiled yet as it targets master and I can't compile master on my main OS yet.
2. Dev and UX question: should the new right to left preference be folded into the touch_box preference and changed from a bool into an enum/drop down?
3. UX question: some users request that touch rect be coloured green instead of red or blue to conform with other software.