REACH-40 Profile UI speed in Dynamo/Flood

While profiling Flood UI speed we found out that in some cases we got more responses from server than we asked for. This was happening because some times event was not unbound correctly. So in this PR I remove event binding each time RunCancelComand received and now we bind event only once on webserver start.
We need to rename this to ```SessionId``` for consistency. Also, the other ```SessionID``` should be renamed to ```SessionId``` in the whole solution so that they all use the same term.