WebUI: Clear trackerList on full update

Like other similar data structures, trackerList also need to be cleared in the event of a full sync update.

PR #21148.

src/webui/www/private/scripts/client.js

@@ -745,6 +745,7 @@ window.addEventListener("DOMContentLoaded", () => {
                         torrentsTable.clear();
                         category_list.clear();
                         tagList.clear();
+                        trackerList.clear();
                     }
                     if (response["rid"])
                         syncMainDataLastResponseId = response["rid"];