Enterprise home css fixes
Created by: attfarhan
Fixes https://github.com/sourcegraph/sourcegraph/issues/13835. Solves the UI nits in https://www.figma.com/file/sPRyyv3nt5h0284nqEuAXE/%2312192-Sourcegraph-server-page-v1?node-id=2274%3A23056.
Created by: attfarhan
Fixes https://github.com/sourcegraph/sourcegraph/issues/13835. Solves the UI nits in https://www.figma.com/file/sPRyyv3nt5h0284nqEuAXE/%2312192-Sourcegraph-server-page-v1?node-id=2274%3A23056.