ref #7095 Fix summary for CategoricalData
ref #7095, #7086 i18n
ref #7095 Fix imports
ref #7095 Add javadoc
ref #7095 Fix aggragation of state data
ref #7095 Fix initalization problems by deproxying
ref #7095 Format enhancement for quantitative data
ref #7095 Optimize aggregation and display of description elements
ref #7095 Fix potential NPE
ref #7095 Fix potential exception
ref #7095 Add categorical data support for summary row
ref #7095 Add summary row to top of grid