Add keyboard shortcuts (#637)

* Add documentation
* Fix manual styling
* Add dialog for setting Movie images
* Mention manual in README

ui/v2.5/src/utils/focus.ts

@@ -0,0 +1,16 @@
+import { useRef } from "react";
+
+const useFocus = () => {
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  const htmlElRef = useRef<any>();
+  const setFocus = () => {
+    const currentEl = htmlElRef.current;
+    if (currentEl) {
+      currentEl.focus();
+    }
+  };
+
+  return [htmlElRef, setFocus] as const;
+};
+
+export default useFocus;