ICE-9411 / ICE-9384 - Simplified API for cell selection and unified with other row/cell features in RowState. Reworked selection and expansion so state changes take place in updateModel. Simplified and renamed showcase selection example.

git-svn-id: http://anonsvn.icesoft.org/repo/icefaces3/trunk/icefaces@36622 1de00972-ac04-4911-a46b-06793c8d78d9
ICE-9411 - Simplified API for cell selection and unified with other row/cell features in RowState.

git-svn-id: http://anonsvn.icesoft.org/repo/icefaces3/trunk/icefaces@36623 1de00972-ac04-4911-a46b-06793c8d78d9