Improved theming for admin vs site.

- Added $theme_path, $base_path
- Added CMS_RESPONSE.module_resource_url (...) instead of using hardcoded "/module/" + name + ...
- Use base_path rather than base_url  (note ROC CMS is not yet working with EWF standalone "base" url option)

examples/demo/site/modules/messaging/files/css/messaging.css

@@ -1,5 +1,4 @@
 .messaging-box fieldset {
-  resize: both;
   display: flex;
   flex-wrap: wrap;
   align-items: flex-start;