When the path of an application - that will handle the extension - is too long, the buttons - new type, edit, reset - will disappear. A solution is using TAB, but it is not pleasant for all users and novice users don´t use (or don´t know how to use)the keyboard for browsing.
short question: Do you want to fix this ? (you assigned this bug to you)
it's a dup.. *** This bug has been marked as a duplicate of 146756 ***