bridge/appsdk-bump-app-catalog 388 bumping sdk to almci-master-3164-19fbf3c

sdk commit: RallySoftware/appsdk@6ff0b6c1d6673a8ce5651b38541655f6b7333799
author: Wade Peterson, Katie Thompson and Richard Green
message: S77315: When a Milestone is deleted, instantiate a confirmation dialog

sdk commit: RallySoftware/appsdk@19fbf3c99d63d18a036ebb0363f2edc6bbd9ebe5
author: Jonathan Baker and Rick Lansky
message: DE22937: Error in S76941 - IE8 - MilestoneListHeader.js pukes -- Object doesn't support this property or method