Some users might not be able to touch the icon due to a motor
disability. Other users might think the "Menu" text is part of the
button and try to touch it instead.
Making the "Menu" text part of the button makes it easier to show/hide
this menu. Besides, it lets screen reader users with a small screen hear
the word "Menu" associated to the button.
We could simplify the HTML a bit more but Foundation's `hamburger` mixin
uses the `::after` element with `position: absolute`, so we can't apply
it directly to the button without making the CSS more complex.
JavaScript is used by about 98% of web users, so by testing without it
enabled, we're only testing that the application works for a very
reduced number of users.
We proceeded this way in the past because CONSUL started using Rails 4.2
and truncating the database between JavaScript tests with database
cleaner, which made these tests terribly slow.
When we upgraded to Rails 5.1 and introduced system tests, we started
using database transactions in JavaScript tests, making these tests much
faster. So now we can use JavaScript tests everywhere without critically
slowing down our test suite.
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.
