Blender Git Loki

GPencil Tablet Support: Eraser now works during Continuous Drawing

When continuous drawing is enabled, the eraser-end of the pen can be used to
erase strokes (as an alternative to RMB).

The keymap system still doesn't let us add such tablet events to the keymap
as actual events though, so we cannot just have a D+Eraser = Erase keymapping.