dont allow expiry to be "set" when viewing a paste

Author: IAmTomahawkx

mystbin/frontend/components/OptsBar.tsx

@@ -217,6 +217,10 @@ export default function OptsBar() {
       optional: true,
       icon: <HourglassFullIcon />,
       callback: () => {
+        if (window.location.pathname !== "/") {
+          return;
+        }
+        
         setCurrentModal(
           <ExpiryModal
             initialValue={expiryValue}