WebUI: font style changes for section titles and column headers

Bug: 849857
Cq-Include-Trybots: luci.chromium.try:closure_compilation
Change-Id: I2bdac0e55708bc7461041365ac736ad2c5bc7bc1
Reviewed-on: https://chromium-review.googlesource.com/1114204
Reviewed-by: Scott Chen <scottchen@chromium.org>
Commit-Queue: Esmael El-Moslimany <aee@chromium.org>
Cr-Commit-Position: refs/heads/master@{#571331}
2 files changed