Editing a Version Start Date and Release date doesn't change the field before refreshing the page

Steps to reproduce:

1. Install a fresh instance of JIRA and install JIRA Agile
2. Create a version on the left panel
3. Configure a Start Date and a Release Date
4. Edit one of the dates (you'll notice that the actual edit won't come up)
5. Reload the page (the edits made will now display correctly)