Refresh tweaks

src/App.tsx

@@ -30,7 +30,7 @@ const App = () => {
   }, [sourcifySource, setSourcifySource]);
 
   return (
-    <Suspense fallback={<>LOADING</>}>
+    <Suspense fallback={null}>
       {runtime.connStatus !== ConnectionStatus.CONNECTED ? (
         <ConnectionErrorPanel
           connStatus={runtime.connStatus}

src/special/london/Blocks.tsx

@@ -103,7 +103,7 @@ const Blocks: React.FC<BlocksProps> = ({ latestBlock, targetBlockNumber }) => {
   );
 
   return (
-    <div className="w-full mb-auto">
+    <div className="w-full flex-grow">
       <div className="px-9 pt-3 pb-12 divide-y-2">
         <div className="relative">
           <div className="flex justify-center items-baseline space-x-2 px-3 pb-2 text-lg text-orange-500 ">

src/special/london/London.tsx

@@ -9,7 +9,7 @@ const London: React.FC = () => {
   const { provider } = useContext(RuntimeContext);
   const block = useLatestBlock(provider);
   if (!provider || !block) {
-    return <></>;
+    return <div className="flex-grow"></div>;
   }
 
   // Display countdown