Bug 1414107: Display tweaks for zone-parent (#4507)
Bug 1414107: Display tweaks for zone-parent (#4507)

- remove large icon on landing page
- keep zone parent text on separate line from document title until
  tablet breakpoint
- make zone parent font size match document title font size
a2sheppy/kuma,a2sheppy/kuma,mozilla/kuma,a2sheppy/kuma,SphinxKnight/kuma,Elchi3/kuma,SphinxKnight/kuma,mozilla/kuma,jwhitlock/kuma,escattone/kuma,jwhitlock/kuma,Elchi3/kuma,SphinxKnight/kuma,Elchi3/kuma,SphinxKnight/kuma,mozilla/kuma,jwhitlock/kuma,jwhitlock/kuma,SphinxKnight/kuma,jwhitlock/kuma,SphinxKnight/kuma,mozilla/kuma,Elchi3/kuma,a2sheppy/kuma,a2sheppy/kuma,mozilla/kuma,Elchi3/kuma,escattone/kuma,escattone/kuma