dom/event: add support for capture events
dom/event: add support for capture events

merongivian/opal-browser,Mogztter/opal-browser,davispuh/opal-browser,Mogztter/opal-browser,merongivian/opal-browser,jgaskins/opal-browser,jeezs/opal-browser,opal/opal-browser,jgaskins/opal-browser,jeezs/opal-browser,merongivian/opal-browser,davispuh/opal-browser,ajjahn/opal-browser,jeezs/opal-browser,jgaskins/opal-browser,opal/opal-browser,ajjahn/opal-browser,davispuh/opal-browser,opal/opal-browser,opal/opal-browser,ajjahn/opal-browser,Mogztter/opal-browser