GWT-675: use SaveButtonBar and EditSessionHandler as in other parts of deskmanager. This wil deactivate other elements of view when editing user or group
GWT-675: correction: don't show rest button for users/groups section.
GWT-675: checkstyle error
Merge pull request #81 from geomajas/GWT-675_UserGroupDisableOthersOnEdit

GWT-675: use SaveButtonBar and EditSessionHandler as in other parts of d...