The macro editor displays the raw parameter feature id as a group heading instead of a translated name

A macro can declare several parameters as alternatives of one same requirement, by annotating them with @PropertyFeature – the user fills in one of them. The macro insert/edit dialog shows such a feature as a box with a heading. That heading is never translated: it shows the raw feature id, in every language.

Steps to reproduce

1. Set the wiki default language to French.
2. Edit a page with the WYSIWYG editor.
3. Insert the Include macro (Insert > Other Macros > Include).

Actual results

Everything in the dialog is in French – "Inclure", "(Obligatoire)", "Paramètres optionnels", "Envoyer" – except the heading of the required box, which reads Reference: the feature id declared by IncludeMacroParameters. On top of that, the box contains a single field, already labelled "Page", so the heading says nothing the user needs.

Expected results

The heading is translated. Better still, no heading at all when the box holds a single visible parameter, since that parameter already has its own label.