refractor: app module and settings (#293)

* Refractor settings component.
* Improve responsiveness of settings component.
* Add comments.

Fixes #292

src/app/app-routing.module.ts

@@ -1,7 +1,10 @@
+/** Angular Imports */
 import { NgModule } from '@angular/core';
 import { Routes, RouterModule } from '@angular/router';
 
-// Fallback when no prior route is matched
+/**
+ * Fallback to this route when no prior route is matched.
+ */
 const routes: Routes = [
   {
     path: '**',
@@ -10,6 +13,11 @@ const routes: Routes = [
   }
 ];
 
+/**
+ * App Routing Module.
+ *
+ * Configures the fallback route.
+ */
 @NgModule({
   imports: [RouterModule.forRoot(routes)],
   exports: [RouterModule],