Have XWiki displayed as last item in the "Navigation" panel

After XWIKI-12832 the panels order changed.
Because XWiki is using a dynamic title

$services.localization.render('xe.xwiki.space')

it is listed first, since $ comes before letters.

The problem is that XWiki is a technical space, and should necessarily not be the first thing an user sees.

A solution Marius proposed is to remove the translation key from the title, since we actually don't provide any translation different from the space name. Also XWiki is a brand name, which usually doesn't need a translation.