feat(dashboard): Update header layout and start page branding#20762

roboquat merged 2 commits intomaingitpod-io/gitpod:mainfrom

siddhant/gro-808-gitpod-classic-needs-to-be-visibly-marked-as-gitpod-classicgitpod-io/gitpod:siddhant/gro-808-gitpod-classic-needs-to-be-visibly-marked-as-gitpod-classicCopy head branch name to clipboard