add a way to delete pads (in padinspector)
add a way to delete pads (in padinspector)

based on code by "Pita", Stefan Mueller, https://github.com/ether/pad/commit/08b529ee5ec1460638cebf7cc03b8b8100a75394

titanpad/titanpad,titanpad/titanpad,titanpad/titanpad,titanpad/titanpad