Suggestion lists of 'suggestDocuments' and 'suggestSpaces' inputs get hidden when overflowing the 'xwikicontent' parent's height

When an input is using the functional classes 'suggestDocuments' and 'suggestSpaces' and the list of suggestions for it reaches the end of the document content, the lists get hidden instead of overflowing towards the end of the page, as much as the suggestion list needs to display its items.

The cause seems to be that for these functional classes, the suggest widget is configured to use the augmented item's parent as 'parentContainer' instead of using the body element, as the default setting does.

Simply removing that configuration and using the default makes the suggestions list properly display as much as they need, without being cropped off.