Handle insertion of trees properly in the descendantentitiesproxymodel.
Handle insertion of trees properly in the descendantentitiesproxymodel.

svn path=/trunk/KDE/kdepim/akonadi/akonadi_next/; revision=993213

lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi