Design refresh: Update PageHeader and move to Wildcard (!20647) · Merge requests · Warren Gifford / sourcegraph · GitLab

Warren Gifford requested to merge tr/page-headers into main May 04, 2021

Created by: umpox

This PR:

Updates the PageHeader layout and styling to match the design refresh
Removes the dependency on Bootstrap, and migrates styling to CSS modules
Implements the updated description field on a few different pages.

closes https://github.com/sourcegraph/sourcegraph/issues/19932