Fix Project Search Zero Results Behavior

Solves: 

When a user enters the project search page from the homepage search form and there are zero results, we'd like the following experience:

- A centered button and text saying "Oops, there are too many filters and we don't have any projects to show." and a button with "Browse all Projects"
- This button would release all the filters and allow the user to either browse what's available or try a different filter combination.