With chromedriver >= 80, the tests are freezing sometimes, particularly
when the same editor is loaded again.
We don't know whether it's a CKEditor issue or a chromedriver issue. In
the past we've had some errors related to CKEditor trying to load the
same instance twice and we aren't sure they have been fixed since we
could never reproduce them.
It could be a coincidence, though. If we modify the views so the only
content of the `<body>` tag is a textarea with the `html-area` class,
chromedriver freezes even if we only access the page once. So maybe
we're only detecting the problem on the second visit because the second
request is faster than the first one.
Since chromedriver no longer hangs after this change, we don't have to
force any chromedriver version anymore.
If we don't use the `exact` option, tests will pass even if filling in
CKEditor adds the content twice or adds the new content to the existing
content, which has actually happened and has gone mostly unnoticed while
testing several ways to fill in CKEditor with Capybara (particularly,
when using Capybara's `send_keys` method). The problem was detected by
just one test, which checked the original content wasn't present anymore
after updating a record.
