This makes the table easier to identify when writing tests and using
screen readers.
Since we do not render any other table captions anywhere else, we're
making the caption invisible so only screen reader users will be
affected by this change.
Even if the test checked all possibilities, it was hard to understand.
Using `have_table with_cols:` to test the order of the rows and testing
one phase is enabled and has a link to edit it es enough IMHO.
Previously the draft mode was a phase of the PB, but that had some
limitations.
Now the phase drafting disappears and therefore the PB can have the
status published or not published (in draft mode).
That will give more flexibility in order to navigate through the
different phases and see how it looks for administrators before
publishing the PB and everybody can see.
By default, the PB is always created in draft mode, so it gives you
the flexibility to adjust and modify anything before publishing it.
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.
