Menu (left navigation) rewrite in React #5759
Description
use the (new) PF3-react components: http://patternfly-react.surge.sh/patternfly-3/index.html?selectedKind=patternfly-react%2FNavigation%2FVertical%20Navigation&selectedStory=Items%20as%20Objects&full=0&addons=1&stories=1&panelRight=0&addonPanel=storybooks%2Fstorybook-addon-knobs
Hacky conversion of menu to JSON is here:
#5610
Keep in touch with @epwinchell and preserve the PF4 styling done for 5.11.
ping @fhlavac