[FEATURE] Enable tabbed floating docks for Qt >= 5.6

nyalldawson · nyalldawson · commit b45a6b42298f · 2016-09-21T13:37:48.000+10:00
diff --git a/src/app/qgisapp.cpp b/src/app/qgisapp.cpp
@@ -618,6 +618,10 @@ QgisApp::QgisApp( QSplashScreen *splash, bool restorePlugins, bool skipVersionCh
   setupUi( this );
   endProfile();
 
+#if QT_VERSION >= 0x050600
+  setDockOptions( dockOptions() | QMainWindow::GroupedDragging ) ;
+#endif
+
   //////////
 
   startProfile( "Checking database" );
