set-html! and event listeners

[taylorSando]

I think you should take out the line of https://github.com/levand/domina/blob/master/src/cljs/domina.cljs#L385

I think you should leave the events as they are, because let us say you had the following:

<div id="top-div">
<!-- child content -->
</div>

If you have an event listener on #top-div and you call set-html! on #top-div, those event listeners are wiped out. It seems like this doesn't need to be the case, because it's just the inner html that is getting changed, not #top-div.

[xavi]

Just wanted to say that I've been bitten by the same problem. (Sorry, no time to contribute a Pull Request now, I'll just set the innerHTML property directly to work around it.)