Will/acceptance test fixes

Fixes for some failures I noticed on (my) PR tests.

1) Added explicit waits for the problem to reload after resetting or checking it.
2) Added JavaScript waits for the Uploads page in Studio
3) Discovered that `click()` does not actually return anything, so none of the `wait_for_js_to_load()` calls were being executed in `css_click()`

@jzoldak