Add a reliable way to clean up plot instances when unmounting a LocusZoom component. This will be particularly useful for dynamic pages, or those that use multiple LocusZoom plot instances.
Clear DOM element
Remove resize event listeners (if any)
Clean up after any plugins that rely on externally registered event listeners (eg dynamic URLs)
Add a reliable way to clean up plot instances when unmounting a LocusZoom component. This will be particularly useful for dynamic pages, or those that use multiple LocusZoom plot instances.