Improve CSS for Project view
Improve CSS for Project view

Also fix CSS (don’t use unit when 0).

pascalchevrel/webdashboard,mozilla-l10n/webdashboard,flodolo/webdashboard,flodolo/webdashboard,mozilla-l10n/webdashboard,pascalchevrel/webdashboard,mozilla-l10n/webdashboard,flodolo/webdashboard