EDIT

ref #7849: handle exception if value of preference not in Enum for areaDisplay

ref #7912 Centralize layout

ref #7912 i18n

ref #7912 Fix selection states in checkbox viewer

ref #7912 Add toolbar to checkbox viewer + visualize selection state

ref #7849: do not save preferences if page was not edited

ref #7849: harmonize admin and local preferences for distribution editor and use drop down instead of radio buttons

ref #7887 Remove unused classes

ref #7887 Code cleanup

ref #7887 Remove grayed value preferences from distributon wizards