Do not display loading text if pages/resources do not exist

[kwajiehao]

Currently, we display a loading text when we're fetching pages or resources. However, even if there are no pages or resources to be found (as with the answerbot repo), the loading text stays on the screen. This is an important issue because we actually have sites without resource rooms (some of the MLAW sites which simply link to the resource room of the main MLAW site).

We can consider using a more understandable text (No resources found), or we might even consider removing the resources button on the left nav of our CMS.