Remove .js from imports (#1948)

* Remove .js from lovelace

Also cleaned up some trailing whitespace

* Go big or go home

* More removals

* Revert changes to gallery webpack

* Revert changes to webpack.config.js

src/common/navigate.ts

@@ -1,4 +1,4 @@
-import { fireEvent } from "./dom/fire_event.js";
+import { fireEvent } from "./dom/fire_event";
 
 export const navigate = (
   node: HTMLElement,