Currently DataPrep directives submenu will open on click. We should improve this to open on hover.
Submenu opens when user hovers over the parent link (e.g. Find and Replace)
Use Case 1: User doesn't hover over the submenu
Submenu closes when user hovers anywhere in the page: other links within the drop down or away from the drop down and onto the page
Use Case 2: User hovers over the submenu
Submenu closes if the user hovers on a different link within the drop down.
Submenu stays open if user hovers onto the page