Webpositive: Drag and drop clippings for images and text

[aesping]

This should perhaps be a ticket to globally add these to Haiku but I'll start here and we'll see what happens.

Much like StyledEdit has support for drag and drop text clippings, (selecting text and dragging it to a folder/desktop) and the same thing for ShowImage (where selecting a piece of a picture and dragging it to a folder/desktop will creating an image clipping) I think it would be nice if Webpositive would have the same features. Drag and drop for both text and images.

For consistency I think this manner of operating on text and images should be universal, but for now adding it to Webpositive would be a step in the right direction.

[luroh]

Moving Web+ enhancements out of R1 milestone.