[LudiusMaximus]

I'm not sure, if this works:

function EZTest_Config.DismountCheck.setFunc(state)
  EZTestData.Config_Dismount = state
  lib.ApplyLayout()
end

Try this and put a print in there to see if anything is happening at all when you click the button:

EZTest_Config.DismountCheck.setFunc = function(state)
  print("This is the DismountCheck button getting", state)
  EZTestData.Config_Dismount = state
  lib.ApplyLayout()
end