The first test asserts that bubbling does not work right now.

The second asserts that stopPropagation works, which should pass when test #1 passes too.

The third test asserts properties about the events passed to the event handler.

THe fourth test asserts that mouse events do not translate to jsaction nor help emit the jsaction binary. This required a change in code to make this pass.

This reuses information already recorded during hydration to
remove jsaction attributes to also stash event handlers. This avoids
a tree walk and looku.