* Create a state for dockedMegaMenu and the function to manage it
* Add the dockedMenu icon and handle the status when clicking it
* Add Megamenu to section nav area when it is docked
* get logic working
* fix mobile
* refactor state + persist in localStorage
* adjust icon and don't use position absolute
* restore old rudderstack tracking
* use Flex instead
* adjust feature toggle to be experimental
* extract out localStorage handling into utils
* don't need separate file
* use store.set/get instead
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Co-authored-by: eledobleefe <laura.fernandez@grafana.com>
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