Fix video embed streaming, permission inheritance in create dialogs, and default to Guest browsing

Frontend/src/Api.js

@@ -117,6 +117,11 @@ export function FetchLock(RootName, RelativePath) {
   return FetchJson(`/lock?${Params}`);
 }
 
+export function FetchInheritedLock(RootName, RelativePath) {
+  const Params = new URLSearchParams({ Root: RootName, Path: RelativePath });
+  return FetchJson(`/lock/inherited?${Params}`);
+}
+
 export function SetLock(RootName, RelativePath, Users, Groups) {
   const Params = new URLSearchParams({ Root: RootName, Path: RelativePath });
   return FetchJson(`/lock?${Params}`, { method: "PUT", ...JsonBody({ Users, Groups }) });