use same Loading progress bar everywhere

frontend/src/Network.tsx

@@ -356,6 +356,7 @@ export const GraphComponent = () => {
                 <br />
                 <i>Ctrl</i> or <i>Shift</i>
               </p>
+              <br />
               <p>drag to pan/rotate</p>
               <hr className="has-background-info" />
               <p>popularity is meassured by rank-weighted in-degree</p>