Move the store to the 'common' folder, it is not customizable anymore

www/common/cryptpad-common.js

@@ -1,12 +1,11 @@
 define([
     '/api/config',
     '/customize/messages.js?app=' + window.location.pathname.split('/').filter(function (x) { return x; }).join('.'),
-    '/customize/fsStore.js',
+    '/common/fsStore.js',
     '/bower_components/chainpad-crypto/crypto.js?v=0.1.5',
     '/bower_components/alertifyjs/dist/js/alertify.js',
     '/bower_components/spin.js/spin.min.js',
     '/common/clipboard.js',
-    '/customize/fsStore.js',
     '/customize/application_config.js',
 
     '/bower_components/jquery/dist/jquery.min.js',