NXP-15145: use better names for new directory aggregate widget types
NXP-15145: fix name for directory aggregate widget type...
NXP-15145: tweak default widget properties
NXP-14230: allow overriding the tabs widget content via a widget property
NXP-15145: make sure EL expressions are still resolved when using SelectItem objects in nxu:selectItems like tag
NXP-15145: make sure directory filters its values in case selected options are mapped
NXP-15145: fix copy/paste errors in separator properties management
NXP-15145: fix default widget property mapping management
NXP-15145: cleanup useless contributions, forgotten after copy/paste