CPackWiX: generate hierarchy of WiX features from CPack components/groups
CPackWiX: associate WiX components with their respective features
CPackWiX: use the FeatureTree UI in case components have been defined
CPackWiX: handle component REQUIRE, HIDDEN and group EXPANDED
Merge topic 'wix-components' into next

49becb8 CPackWiX: handle component REQUIRE, HIDDEN and group EXPANDED
f527a0a CPackWiX: use the FeatureTree UI in case components have been defined
6e9d711 CPackWiX: associate WiX components with their respective features
81a16dd CPackWiX: generate hierarchy of WiX features from CPack components/groups