Re: [PATCH v2 0/4] MR1373: mshtml: Page-wide events implementation.

[Gabriel Ivăncescu (＠insn)]

I think `pageshow` might be the only one we can use from Gecko, the
other two are intertwined on native IE and must be sent on all windows
interleaved. It will also be necessary to control their dispatch
ourselves when implementing performance.timing.unloadEventStart (and the
respective End).

Coincidentally, for the EVENT_BIND_TO_TARGET being window, while looking
at a bug now, I just discovered that `handle_htmlevent` silently drops
all gecko events routed to the window, because we expect a node, but the
window is not one. (this is an existing issue and a pretty nasty one)

So I'll fix that, too.