Revert "Update media test to use PlayerTest player"

This reverts commit 1c225dab07832b7e911566e1ce29f295f359fb16.
Revert "Prevent default action for handled media events. Fixes #573 and fixes #620 (dup)"

This reverts commit 0bdbe02858314d565641d681a66263e3732fef83.
Make event triggering obey event.bubbles attribute. Fixes #573 and #620