8159690: [TESTBUG] Mark headful tests with @key headful.
Reviewed-by: simonis, alexsch

6943119: Rebrand source copyright notices
Reviewed-by: darcy, weijun

6693253: Security Warning appearance requires enhancements
6779717: A Window does not show applet security warning icon on X platforms
6785058: Parent dn't get the focus after dialog is closed if security warning is applied
Summary: Forward-port from 6u10-6u14
Reviewed-by: art, dcherepanov