appsdk-bump-app-catalog 90 bumping sdk to 2626-16f8160

sdk commit: RallySoftware/appsdk@16f81605e7aa48f540ba82f8a947d26e006d38d4
author: Garston Tremblay and Richard Green
message: DE21919: PI Timeline: CSS -- 333 instead of FFF for text color on percentDonePopover