Layer selection: Select first when show all, select when made visible, unselect layer when hide all, unselect layer when made invisible.
Layer selection: Select first when show all, select when made visible, unselect layer when hide all, unselect layer when made invisible.

git-svn-id: 72be86b264330ed682e005c5cdc158cd11214727@120 b13ead23-0dcf-405c-9d34-bbe0b799025b

gyaikhom/ngembryo,gyaikhom/ngembryo,gyaikhom/ngembryo