EDIT

ref #7086, #7095 Add refresh button to WS navigator

ref #7086, #7095 Adapt working set navigator to work with WorkingSets

ref #7086, #7095 Enhance error message

ref #7086, #7095 Fix potential class cast exception

ref #7086, #7095 Add create/delete handler to WS navigator

ref #7086, #7095 Added "Open in..." menu for WS and matrix editor

ref #7086 Add browse button to open working sets in WS editor

ref #7095 Open character matrix with WS as input

ref #7086 Do not open WS editor for null selection

ref #7086 Fix merge issues