appsdk-bump-app-catalog 308 bumping sdk to 1557-23ff74b

sdk commit: RallySoftware/appsdk@23ff74b231fd00005a8c3a24d833b730e55cdf4b
author: Brandon Fryslie and Kyle Morse
message: Revert "Revert "DE19632: TreeGrid - Error when changing the amount of artifacts to be shown on the grid""