dispatchEventの返り値を返していなかった
dispatchEventの返り値を返していなかった

git-svn-id: 8f7ef6d58c3e93671c5a6659438fbe5b913ea811@5988 599a83e7-65a4-db11-8015-0010dcdd6dc2

piroor/fxaddonlib-persistent-attributes,piroor/fxaddonlib-namespace,piroor/fxaddonlib-extensions,piroor/fxaddonlib-confirm-popup,piroor/fxaddonlib-animation-manager,piroor/fxaddonlib-arrowscrollbox-scroll-helper,piroor/fxaddonlib-autoscroll,piroor/fxaddonlib-prefs,piroor/fxaddonlib-boxobject,piroor/fxaddonlib-jstimer,piroor/fxaddonlib-bookmark-multiple-tabs,piroor/fxaddonlib-operation-history,piroor/fxaddonlib-stringbundle,piroor/fxaddonlib-uninstallation-listener,piroor/fxaddonlib-stop-rendering,piroor/fxaddonlib-confirm-tab