In ConceptPropertyValue.getLabel(), the $fallback parameter should have another name

[tfrancart]

In https://github.com/NatLibFi/Skosmos/blob/master/model/ConceptPropertyValue.php#L38, the variable $fallback passed as a method parameter is overidden in the inner for loop to check for fallback languages. Hence the last test of the function if($fallback == 'uri') never works.

This causes problem when printing translated values of the "type" in Group pages, since this rely on this fallback mechanism to print the label of the entry type. See screenshot

The solution is to rename the parameter to something else than "fallback".