11095 ----- Issue 1579: Preferences migration part8 --------- * The old preference browser reveals migration status (now we know what is done) : - light green: fully migrated (class variable + a setting) - light blue: semi migrated (class variable only with a default value which reflects a design decision but no setting). - light red: not migrated (should be removed or decision is pending) - transparent: others :) * added taskbar icons to ObjectExplorer and Inspector * migrate "general" preference group