Reduce Scripts needed on start up to reduce critical requests aka speed up initial loading

public/service-worker.js

@@ -5,7 +5,7 @@ const relativePathsToCache = [
     './',
     'index.html',
     'manifest.json',
-    'styles/main-styles.css',
+    'styles/styles-main.css',
     'styles/deferred-styles.css',
     'scripts/localization.js',
     'scripts/main.js',
@@ -13,10 +13,9 @@ const relativePathsToCache = [
     'scripts/no-sleep.min.js',
     'scripts/persistent-storage.js',
     'scripts/qr-code.min.js',
-    'scripts/theme.js',
     'scripts/ui.js',
+    'scripts/ui-main.js',
     'scripts/util.js',
-    'scripts/util-main.js',
     'scripts/zip.min.js',
     'sounds/blop.mp3',
     'sounds/blop.ogg',