Allow icon drag (copy) to poly VI

[SteenSchmidt]

Hi,

A small feature request: Allow mouse dragging (copying) of an icon from a VI to a poly VI. Currently this is only possible between ordinary VIs:

Btw, do we really need the Edit Icon button on the poly VI dialog? Why not simply double click the icon as on standard VIs?

And while we're at it, please consider these two ideas as well: Allow Drag and Drop of Polymorphic VI to Block Diagram From Icon and Don't flatten icon layers when dragging from another VI.

Cheers,

Steen