Add hst:labels for components in containers without catalog item

All container item component nodes that are configured as catalog items have an hst:label property. That value shows up nicely in the component property dialog header after a catalog item is added to a container (because the label property is copied).

Some features add components directly in workspace containers without users having to place them there. They don't need to have a catalog item even. For example the news and event detail component on the respective detail pages. Here the label is missing, see:

Adding a label to these container item nodes would be a nice but small brush up.