wallet-ext: hide dapp connection status when not connected

* showing `not connected` without a further explanations in a tooltip seems to be confusing
* also when the active tab is the extension itself (in expanded mode) it doesn't seem correct

wallet/src/ui/app/shared/dapp-status/index.tsx

@@ -74,6 +74,9 @@ function DappStatus() {
             setDisconnecting(false);
         }
     }, [disconnecting, isConnected, activeOriginUrl, dispatch]);
+    if (!isConnected) {
+        return null;
+    }
     return (
         <div className={st.wrapper} ref={wrapperRef}>
             <Component