fix(requests): do not fail request edits if acting user lacks Manage Users permission (#2338)

* fix(api): fix requestedBy logic in request edits

* fix(frontend): do not display empty advanced request options box

* fix(frontend): set max height on modal backdrop

src/components/Common/Modal/index.tsx

@@ -111,7 +111,7 @@ const Modal: React.FC<ModalProps> = ({
           }}
         >
           {backdrop && (
-            <div className="absolute top-0 left-0 right-0 z-0 w-full h-64">
+            <div className="absolute top-0 left-0 right-0 z-0 w-full h-64 max-h-full">
               <CachedImage
                 alt=""
                 src={backdrop}