make sure authorization dialogs are shown on top. fixes kolab/issue3799
make sure authorization dialogs are shown on top.
fixes kolab/issue3799

MERGE:e4,trunk,4.3

svn path=/branches/kdepim/enterprise/kdepim/; revision=1019828

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