Navigation: Add help menu to top search bar (#55062)

* add help menu to top search bar

* fixes

* handle preventDefault in node graph specifically

* use icon prop of MenuItem

* undo changes to ContextMenuPlugin/DataLinksContextMenu

* remove unused component

* revert storybook changes

* Tweaks

* remove unused style

* stop propagation on the header so version can be highlighted

* make sure useContextMenu has the exact same logic as before

Co-authored-by: Ashley Harrison <ashley.harrison@grafana.com>
Co-authored-by: Torkel Ödegaard <torkel@grafana.com>

public/app/plugins/panel/nodeGraph/useContextMenu.tsx

@@ -109,7 +109,17 @@ function mapMenuItem<T extends NodeDatum | EdgeDatum>(item: T) {
         url={link.url}
         label={link.label}
         ariaLabel={link.ariaLabel}
-        onClick={link.onClick ? () => link.onClick?.(item) : undefined}
+        onClick={
+          link.onClick
+            ? (event) => {
+                if (!(event?.ctrlKey || event?.metaKey || event?.shiftKey)) {
+                  event?.preventDefault();
+                  event?.stopPropagation();
+                  link.onClick?.(item);
+                }
+              }
+            : undefined
+        }
         target={'_self'}
       />
     );