Clear hash in updateAppMetadata will result in refresh

[thekingofcity]

diff --git a/runtime-demo/src/components/metadata-demo.tsx b/runtime-demo/src/components/metadata-demo.tsx
index c9f9f7d..c76d03f 100644
--- a/runtime-demo/src/components/metadata-demo.tsx
+++ b/runtime-demo/src/components/metadata-demo.tsx
@@ -35,6 +35,10 @@ export default function MetadataDemo() {
         rmgRuntime.updateAppMetadata({ hash: `/${incrementAndGet()}` });
     };
 
+    const handleResetHash = () => {
+        rmgRuntime.updateAppMetadata({ hash: '' });
+    };
+
     return (
         <RmgSection>
             <RmgSectionHeader>
@@ -53,6 +57,9 @@ export default function MetadataDemo() {
                 <Button size="sm" onClick={handleUpdateHash}>
                     Update hash
                 </Button>
+                <Button size="sm" onClick={handleResetHash}>
+                    Reset hash
+                </Button>
             </HStack>
         </RmgSection>
     );

[wongchito]

When updating query parameters or removing the hash (including the #) from the URL src of an iframe element, the iframe will be reloaded.

Rather than updating the iframe src attribute immediately after receiving updateAppMetadata, we instead store the updated metadata in localStorage, which will be used in RMT next load.