OWL datatype restriction custom view

[KonradHoeffner]

What new feature do you want?

Part of #29.

For example:

    [
        a owl:Restriction;
        owl:onProperty :has_value;
        owl:someValuesFrom [
          a rdfs:Datatype;
          owl:onDatatype xsd:decimal;
          owl:withRestrictions ([ xsd:minInclusive 18 ] [ xsd:maxExclusive 34 ])
        ]
    ]

Should be shown as [18,34).

[KonradHoeffner]

Maybe we should implement lists first.