Enable password field tests, move Super Scaffolding file tests

[gazayas]

Addresses a couple of TODOs in the Super Scaffolding test setup script.

As far as TestFile goes, we already had a test for it in the partial test, but we can go with this PR if it belongs in super_scaffolding_test.rb instead.

[andrewculver]

@gazayas

[gazayas]

Meme saved! 👆

Hadn't checked my fork in a while, 22 commits behind will do it 😅️

[jagthedrummer]

@gazayas Looks like another conflict has cropped up. If you can resolve it I'll merge this ASAP to avoid any more conflicts.

[gazayas]

It looks like some of these tests were covered in #86 and #660, so there's not much left here after merging. We do get rid of the TODOs though, and add we also add one TODO related to finding a "one" option with Capybara. This one should be good to go!