Testing: Change step language to better match functionality

[plocket]

~Basically, instead of 'check checkbox', say 'click checkbox' as it's more accurate.~

Handle 'check', 'click', 'tap' issues better

• Change human language of 'click' to 'tap' everywhere.
• Instead of 'check checkbox', say 'tap checkbox' as it's more accurate.
• Implement dynamic 'click' vs. 'tap' in code based on device that is being emulated.
• Implement a little bit more specificity with string required for choosing device for interview. It's not really complete as I'm considering adding the ability to specify a filename as well. Bleh.

[plocket]

Shoot, maybe we want to change this to 'tap'

[plocket]

fyi - did change it and the approach and edited commit description above.