Alpha 6 - result scale controls added.

Changelog:

• added result scale controls, now the result texture can be zoomed in and out
• added arrow navigation for the selected subtile in the result texture
• selected subtile now persists when tile is redrawn or even switched (and new tile has a subtile with the same bitmask)
• changed tile part highlight in the input image to look like a mask - to show what part of it is discarded and what is used
• fixed some UI bugs
• fixed a program crash on frame row control input