When adding the OAuth2 apps page, I neglected to update the account page

tests to account for the new page. While updating these tests, I

replaced the hardcoded strings of page IDs with fetching the default

page classes from the registry itself and updated all the tests to do

set comparisons instead of length comparisons, which did not indicate

why a test was failing, only that it was.
With this modernization, these tests shouldn't break in the future when

the set of pages changes.

Ran unit tests.