Documentation for plugins in general: Goals comprises more than that

In the `site.xml` of all plugins, there is an entry

```
<item name="Goals" href="plugin-info.html"/>
```
leading to an according entry in the sidebar menu.

The item name is misleading: it should be Plugin Info or Plugin Documentation,
because it is more than just Goals.
Interesting enough, the goals do not have a separate subsection.
Or it is called Goals and related.. I dont know.