Deleting a collection should detach associated drafts from it (#5082)

Co-authored-by: Tom Moor <tom.moor@gmail.com>

app/utils/routeHelpers.ts

@@ -101,7 +101,7 @@ export function updateDocumentPath(oldUrl: string, document: Document): string {
 }
 
 export function newDocumentPath(
-  collectionId?: string,
+  collectionId?: string | null,
   params: {
     parentDocumentId?: string;
     templateId?: string;