drawnumber gui interaction to accept decimal numbers
when editing a number stored in a drawnumber scalar, be it by typing or mouse-dragging, it's only possible to input whole numbers. Since decimal numbers are accepted, it would make sense to have the same behaviour as in a number atom: type . and input the decimal part, and shift-click goes through the decimal numbers. This is a new feature also not present in any other pd version, so it would be good to make the code vanilla-compatible (and see if Miller wants to take it in).