Qt4 - Try to use a Tool Dialog for the GotoTime dialog.

modules/gui/qt4/dialogs/gototime.cpp

@@ -40,6 +40,7 @@ GotoTimeDialog *GotoTimeDialog::instance = NULL;
 
 GotoTimeDialog::GotoTimeDialog( intf_thread_t *_p_intf) :  QVLCFrame( _p_intf )
 {
+    setWindowFlags( Qt::Tool );
     setWindowTitle( qtr( "Go to Time" ) );
     resize( 250, 180 );