No warning that you're leaving the page when reporting bugs

[Daniel Neel]

If a user clicks "File a bug" the following happens:

Anytime during the process of reporting the bug (from where the "Summary:" field appears to clicking "Submit Bug Report"), it is possible to exit the page by accidentally pressing Alt-Left/Right, the Back arrow, etc. This can be very annoying when a user is in the middle of typing up a description of a bug and all of the text that had been entered must be retyped.

Suggestion to improve:
 Implement a pop-up box similar to Wikipedia's edit pages. For example, at this link (http://en.wikipedia.org/w/index.php?title=Makinti_Napanangka&action=edit) if one attempts to travel away from the page, a warning pops up that says: "This page is asking you to confirm that you want to leave - data you have entered may not be saved."

Adding this or something similar would, I think, improve the bug reporting experience for all people using Launchpad, reducing potential frustrations users/developers may encounter.