Drag and drop issues

[GoogleCodeExporter]

To allow drag and drop in phpdesktop you need to set the "external_drag" 
setting to true, see the ChromeSettings wiki page. The name is unfortunate as 
it controls both external dragging (from OS/other applications) and internal 
dragging on webpages. Internal dragging should be enabled by default without 
the need of any setting.

Original issue reported on code.google.com by [email protected] on 24 Mar 2014 at 7:03