Instead of showing a big "Configure File Type" or "Create file tyep" button, show which application will open this file by default with an option to change that.
The logic when clicking the dialog (editing existing file type or creating a new one) is unchanged but the visual representation is made more self-explanatory.
While at it, fix KAuthorized check for editfiletype not working.
Adding this bigass button was one of my first KDE contributions which I somewhat regret :) The original button was just a tiny toolbar icon easily overlooked but with this I think it's both visually pleasing and user-friendly.
