[bug] gmc drags on desktop

[Richard Hult <rhult hem2 passagen se>]

When starting a drag on an icon on the desktop, it first shows up in
the upper left corner for a short time and then back to where the mouse
pointer is.

Otherwise gmc is working great and getting better and better!! I had
some troubles with files with very long filenames earlier but that
problem has went away.

Richard.