This MR is work towards the final product
proposed here:
https://gitlab.com/gitlab-org/gitlab/-/issues/213219

This MR updates the Geo Projects
filters and top nav to match the design spec.

This follows the markup/css used for this MR:
https://gitlab.com/gitlab-org/gitlab/-/merge_requests/29979

Nothing functionally changes in this MR,
this is stricly a UI/UX change.