Wrong Drag and Drop indications in roster
Bug description
Gajim does not display proper Drag and Drop indications.
Steps to reproduce
Drag account/group row in roster:: Gajim would display a cursor indicating that it is possible to reorder account/group rows in roster.
Drag contact row in roster:: Gajim would display a cursor indicating that it is possible to reorder contact rows in roster, but it is indeed possible to add contact from one account to another by Drag and Drop.