allow sidemenu sections without children still have a hover menu/header

public/app/core/components/sidemenu/TopSectionItem.tsx

@@ -15,7 +15,7 @@ const TopSectionItem: SFC<Props> = props => {
           {link.img && <img src={link.img} />}
         </span>
       </a>
-      {link.children && <SideMenuDropDown link={link} />}
+      <SideMenuDropDown link={link} />
     </div>
   );
 };

public/app/core/components/sidemenu/__snapshots__/TopSectionItem.test.tsx.snap

@@ -13,5 +13,8 @@ exports[`Render should render component 1`] = `
       <i />
     </span>
   </a>
+  <SideMenuDropDown
+    link={Object {}}
+  />
 </div>
 `;