Add a loading spinner when changing sorting order on usage page

[gtsiolis]

Problem to solve

Changing timestamp sorting order on usage page makes the dashboard unresponsive and seem like it's broken.

Steps to reproduce

1. Go to /t/gitpod/usage
2. Click on the Timestamp sorting icon to change the sorting order

While navigating through the 100+ pages using client-side pagination is not an issue, changing sorting order makes the product feel broken or unresponsive.

See relevant discussion (internal). Cc @laushinka @jankeromnes @easyCZ

Proposal

Until we have proper server-side pagination in place, we could show a loading spinner when changing sorting order, as we do when selecting other monthly periods.

[jldec]

This column is not sortable since #12501
closing.