Add refresh/leave page dialogue within issue editing pages to prevent lost data. (user request)

I really appreciate Issue Tracker of Bitbucket. However, I've noticed that Issue Tracker page does not warn when leaving in the middle of editing. In fact, I've lost quite a labor-intensive comments a few times by this. Sometimes, preview and finished comment look the same and I tend to reload the page inadvertently. I am pretty sure that showing "Do you really want to leave the page?" dialog is not an issue for Atlassian, so please implement that feature.