Provide means for deleting waypoints on touch screen

[mairas]

In route editing mode, waypoint deletion is done by control-clicking. This is simple enough on a computer, but prevents deletion on a touch screen. One approach would be to activate an edit menu using a long-press. At first, the menu could just have a "delete" option.

[panaaj]

Added the ability to use right-click or long press on touch device to delete a point in the next release.