fix null output

src/Mods/Reminder/reminder.js

@@ -26,7 +26,7 @@ App.Reminders.add = function(message, week, category = "manual") {
  */
 App.Reminders.list = function list({maxFuture = Number.POSITIVE_INFINITY, category = "all", link = false} = {}) {
 	if (V.reminders.length === 0) {
-		return null;
+		return document.createDocumentFragment();
 	}
 
 	/**