ref #7912 Add flag to allow selection of top level nodes
code cleanup
ref #7912 i18n
ref #7912 Add "Select direct children" button
ref #7912 Fix font evaluation in checkbox tree composite
ref #7912 Centralize layout
ref #7912 Fix selection states in checkbox viewer
ref #7912 Add toolbar to checkbox viewer + visualize selection state
ref #7887 Fix initial grayed state in checkbox composite
ref #7887 Fix javadoc
ref #7887 Use DTOs in term editor