Fixup help center panel links

Our help structure has diverged significantly from upstream, so we
need to update the control center panels to point to the correct pages
[endlessm/eos-shell#4160]
Remove special color help page links

We dropped the color pages from the help center as they lacked much
in the way of useful content and just told you to buy special hardware.

We need to kill the links to those pages
[endlessm/eos-shell#4160]
Merge pull request #28 from endlessm/shell/4160

Shell/4160