Bug 995035 - Hide invisible parts of SMS app from screen reader.

so, this works well in the browser, but not really on the device... at least if you have enough data to make it too slow.

I really see that the panel is painted after it's displayed (and I don't see on master, I checked)

My guess is that the graphics team has a shortcut here, and knows what to animate before animating it, and so the painting due to visibility being visible hapens too late, or something like this.

I admit I don't know the solution for this... As far as accessibility is concerned, I'd use aria-hidden...