Aurelia change event Firefox woes

In the continuing adventures of Firefox vs other browsers (see Aurelia Firefox and Input fields), I was watching a checkbox using a change.trigger() to update the checkbox selection state for a search facet.  I noticed in Firefox that the change event checkbox selection value was pre-change vs Chrome and other browsers where the selection value was post-change.

Gitter Aurelia conversation discussed the issue and approach to fix it.

	<!-- Have to use change.delegate below due to FF vs all other browsers
	issue https://gitter.im/Aurelia/Discuss?at=5639d129a530033014e41607 -->
	<input class="searchcheckbox"
	id="option"
	type="checkbox"
	name="field"
	value="option"
	checked.bind="value.selected"
	change.delegate="updateSelectedFacetValue($parent.$index, $index, value)"
	class="filterboxcheck col-xs-1">

view raw checkbox.html hosted with ❤ by GitHub

Using change.delegate gives the change event time to finish processing before it's handled.  I'm a little concerned about timing issues still as this doesn't seem deterministic, but it's working pretty well now.