SessionStateEditor no longer uses XML for LinkableString session state set or get (support for unescaped special characters in the editor).
SessionStateEditor no longer uses XML for LinkableString session state
set or get (support for unescaped special characters in the editor).

Change-Id: I5023dbdc88a7c10c3d9b68f90b42237853c4aa1a

WeaveTeam/WeaveJS,WeaveTeam/WeaveJS,WeaveTeam/WeaveJS,WeaveTeam/WeaveJS