appsdk-bump-app-catalog 56 bumping sdk to 2580-219ee54

sdk commit: RallySoftware/appsdk@d10113403fbc97cbf3d60fa40922e23e9af272b6
author: Ben Wittenberg
message: DE21269 Iteration and Release now get required field styling without a timing issue

sdk commit: RallySoftware/appsdk@64434e9ca176673fa90d2f1d53f4dc440d898a81
author: Will Klein and Trevor Farlow
message: DE21815: Legend for charts on new iteration status page missing/cut off