We've had to add a couple of hacks in order to make jQuery UI datepicker
work with Turbolinks, and one of our tests is failing because the
datepicker changes its height when changing from a month with 5 weeks to
a month with 6 weeks.
We could add a workaround so the test still passes (jQuery UI doesn't
provide a configuration option to always displays 6 weeks in the
datepicker), but I think it's easier to just use the HTML5 native date
input field, which also allows us to simplify the code a bit and IMHO it
improves the user experience, particularly when using mobile phones.
Since date fields are not supported in Safari and Internet Explorer,
we're still using the jQuery UI datepicker on those browsers (and on any
other browser not supporting date fields).
Due to these changes, we're moving the tests checking datepicker's
behaviour to the dashboard. I've choosing not to change the public pages
because I'm not 100% sure everybody would like this change (some people
prefer the datepicker because we can configure the way it looks).
