UI: Decode URL in text field for better readability

This PR is a follow-up to #2138. It extends the URL decoding logic to include the edit collection dialogs, ensuring a consistent user experience.

Author: bb2

radicale/web/internal_data/js/scenes/CreateEditCollectionScene.js

@@ -196,7 +196,7 @@ export class CreateEditCollectionScene {
         this._remove_invalid_types();
         this._html_scene.classList.remove("hidden");
         if (this._edit && this._title_form) {
-            this._title_form.textContent = this._collection.displayname || this._collection.href;
+            this._title_form.textContent = this._collection.displayname || decodeURIComponent(this._collection.href);
         }
         this._fill_form();
         this._submit_btn.onclick = () => this._onsubmit();
@@ -230,4 +230,4 @@ export class CreateEditCollectionScene {
         return extract_title(this._collection);
     }
 
-}
+}