In 3d mold, Groupbox cave has extra top border when having title, compared with having caption.
<hlayout> <groupbox mold="3d" height="200px" width="200px"> <caption label="Groupbox" /> Groupbox </groupbox> <groupbox mold="3d" title="Groupbox" height="200px" width="200px"> Groupbox </groupbox> </hlayout>
cause:
_contentAttrs: function () { ... if (cap) s = 'border-top:0;' + (s||''); // <- should concern title too ... },