Added .sv_* files that are files for directories. So you can now edit

directories as files.

Frontend/src/Api.js

@@ -194,6 +194,11 @@ export function DeleteEntry(RootName, RelativePath) {
   return FetchJson(`/tree?${Params}`, { method: "DELETE" });
 }
 
+export function EnsureDirectoryNote(RootName, RelativePath) {
+  const Params = new URLSearchParams({ Root: RootName, Path: RelativePath });
+  return FetchJson(`/note?${Params}`, { method: "POST" });
+}
+
 // --- Settings / themes -------------------------------------------------
 
 export function FetchSettings() {