resolve the issue with popover spewing componentWillReceiveProps deprecation warnings #2
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There is a PR up at jasonkuhrt/react-popover#208, but it doesn't actually work AFAICT (tested in their own storybook locally). The problem is that the check for state change isn't enough, as it creates a chicken and egg problem with when the containerEl field is set on the popover ref - the state doesn't change initially.
The state can't be assumed to change always, so go back to checking props for opening/closing, the way the component worked previously (except do it in componentDidUpdate to prevent the warning spew)