Defining a behavior on hover means making it different for people using
a keyboard or a touchscreen (most of the population, nowadays).
In this case, we had an accessibility issue where the message wouldn't
disappear once it appeared. That meant that, after tabbing through all
the links and buttons in, for instance, the debates index, the page
would be filled with "participation not allowed" messages, and in order
to see the information about how many people have voted, reloading the
page was required.
For touchscreen users the behavior was similar to what we get on hover,
although we've found some inconsistencies when trying to support several
elements on the same page.
We think in proposals it makes sense to hide the "support" button when
users click on it, and the same applies to the buttonsto support and
vote investment projects. However, we aren't hiding the buttons to
agree/disagree with a debate in order to keep the information about the
current number of people agreeing and disagreeing visible.
Note we're removing some support spec methods because after these
changes the duplication isn't as obvious as it was in the past.
As mentioned in commits 5311daadf and bb958daf0, using links combined
with JavaScript to generate POST requests to the server has a few
issues.
We're also improving the keyboard access. Previously, the links were
focusable and clickable with the keyboard. Now we're disabling the
buttons when voting isn't allowed.
Since these elements can no longer be focused, we're adding an element
with `tabindex="0"` so the "participation not allowed" message is shown,
like we do in most places.
Note we're slightly changing one test because now when hovering over the
button on Chrome, the "participation not allowed" text isn't shown; it's
only shown when hovering on the parts of the `div.ballot` element
outside the button. Since we're already rewriting the behavior of the
"participation not allowed" text in a different pull request, we aren't
going to fix this behavior.
Note we're using the `budgets.investments.investment.add_label` and
`budgets.ballots.show.remove_label` internationalization keys so they're
consistent with the `budgets.investments.investment.add` and
`budgets.ballots.show.remove` keys which were already present. We aren't
unifying these keys in order to keep existing translations.
