Enhance Mobile Support on AutoSolver

[Andrew1431]

The auto-solver works on mobile presently, but it's a pain in the ass to click the correct prongs on the Puzzle component.

Here is what I plan to add (not blocking #2):

• Allow click & drag to line up prong precisely where you mean to
• Allow to select the layer you wish to edit so that any presses anywhere in the circle will hit that prong on that layer, instead of needing fine-point accuracy on a small device
• Allow zooming in when selecting preconfigured-keys (aka setting grid from 4, 5, 6, 7, etc... via + / - buttons)

[Andrew1431]

I have resolved all these in my PR :P