we lose our search if we click on a project and navigate back

[mattwr18]

Expected Behavior

A user's search should persist navigating to project's info page/until they clear their search

Current Behavior

At the moment, we can search for projects based on the programming language they use.
If one clicks on a project to see a more detailed view of its info, then navigates back to /projects, they lose their search term

Possible Solution

save the searched-for language to Redux

Steps to Reproduce (for bugs)

1. visit /projects
2. search for a language in the dropdown, e.g. JavaScript
3. click on one of the project's, which will take you to /projects/<project-slug>
4. click on the back button in your browser

Context

Users expect that when they search for a term, that search will be preserved until they clear it.