We've had a failure in one of our test suite runs [1]. A possible cause
could be an HTTP request taking place at the same time as an AJAX
request, with both trying to access the database at the same time.
We've had several similar issues in the past which have been fixed by
checking the AJAX request has finished before requesting another page,
so we're applying the same principle here.
[1] https://github.com/consul/consul/runs/1855207922
We were repeating the same code over and over (with a few variants) to
setup tests which require an administrator. We can use a tag and
simplify the code.
These tests were supposed to check the link to vote is hidden when users
don't have permission to vote. However, they aren't testing that, since
the `visible: false` option also matches visible elements. The links are
actually considered visible since they're displayed by the browser;
there's just another element on top of them.
Using `obscured: true` instead of `visible: false` solves the issue.
However, while the `obscured` option is true when the element is hidden
by another element, it's also true when the element is not currently
visible in the browser window, so in some cases we need to scroll so the
condition is effective.
