The footer of the dialog is currently too narrow: the buttons look very much crammed into it. Also, the distance between the last field in the form and the border separating dialog body and footer is too small, which doesn't make the dialog to appear generous enough.
Please do the following:
- set the top and the bottom padding of the "dialog-footer" to 7px each (currently: 5px)
- increase the bottom padding of the form to 40px. Make sure it remains 40px also when an error and/or help text appears.