The event target may be from a different document to the document associated with the
event handler.

Use generic event dispatcher instead of nsevent for the
DOMContentLoaded event.

Also allow processing before dispatching event.

Only update dom_content_loaded_event start/end time when the event is
trusted.

Discord calls this function when hanging up a call.

MIDI tracks don't map one-to-one to segment tracks, so it doesn't make sense to use a
"get_next_track()" interface.

The field is set but no longer read from.

Apparently, 1454ffe7 introduced
the assumption that the font passed to gdip_format_string is
non-NULL, and GdipAddPathString wasn't passing it in.

When hwnd is specified, it is because it received a direct host input,
so switch the input desktop to match the one that is receiving it.

We don't validate that the sending thread uses the same desktop as the
target window: it may not even be the case for drivers with a separate
thread that listens on input events.