fix single quote imports in loading

Currently it only handles double quote imports, but mangled single quote imports. Keeping double quote imports for now so it can load single quote ones from external and double quote from internal.

sw.js

@@ -19,7 +19,7 @@ async function initCache() {
     '/loader/editor-build.js',
     '/menu/dropdown.js',
     '/settings/page-settings.js',
-  ]) //1
+  ]) //2
 }
 
 self.addEventListener("install", event => {
@@ -55,4 +55,4 @@ self.addEventListener('fetch', event => {
 
 self.addEventListener('activate', event => {
   event.waitUntil(clients.claim())
-})
+})