Improve Search

[VinnyStalck]

Category Search

Currently, if you start searching on a category with a child categories on it, the space of the search result is reduced by the space used by the child categories.

That can be a problem if there are too many child categories and even not showing the search results in the first page if the page is full of categories.

Fix 1 - Include categories as part of the search

Also helps when #14 becomes a problem.

Fix 2 - Hide all categories during search

Boring but easier route.