team page does not follow 3.0 UI examples

Placing the 'Maintained packages' link in the related software portlet is a bad idea because that portlet won't be shown when the team is not the maintainer of any projects, so the link would be visible only if the team maintains one or more projects.

The ppas portlet is currently shown unconditionally, but that's a bug because when the team has no PPA and the current user has no permission to create one, the portlet shows up empty.

I think we need a new 'Maintained packages' portlet, but that's probably a post 3.0 thing. What do you think, Curtis?

I think the portlet may make sense since there is related software, related packages, and realted PPA. I think we need a place to put this link in the mean time.

I propose we follow the example of the pillar pages and include a horizontal list of links after the description, before we split maincontent into columns. We include the three links to software, packages, and ppas (this is also a creepy continuation of the bar that continues to appear on their pages.)

<ul class="horizontal">
  <li
    tal:define="link context/menu:overview/software"
    tal:condifion="link/enabled"
    tal:content="link:fmt/link">
  <li
    tal:define="link context/menu:overview/packages"
    tal:condifion="link/enabled"
    tal:content="link:fmt/link">
  <li
    tal:define="link context/menu:overview/ppas"
    tal:condifion="link/enabled"
    tal:content="link:fmt/link">
</ul>