refactor: update color mode switch

Author: mrholek

src/js/color-modes.js

@@ -7,7 +7,7 @@
 (() => {
   'use strict'
 
-  const THEME = 'coreui-docs-theme'
+  const THEME = 'coreui-free-bootstrap-admin-template-theme'
 
   const storedTheme = localStorage.getItem(THEME)
 

src/js/config.js

@@ -8,9 +8,10 @@
 (() => {
   'use strict'
 
+  const THEME = 'coreui-free-bootstrap-admin-template-theme'
   const urlParams = new URLSearchParams(window.location.href.split('?')[1])
 
   if (urlParams.get('theme') && ['auto', 'dark', 'light'].includes(urlParams.get('theme'))) {
-    localStorage.setItem('theme', urlParams.get('theme'))
+    localStorage.setItem(THEME, urlParams.get('theme'))
   }
 })()