appsdk-bump-app-catalog 564 bumping sdk to 2118-27c771b

sdk commit: RallySoftware/appsdk@a07a9a6ccd611d742b0b2bc6bb01976e24a061e5
author: Robert Everett
message: Revert "Revert "DE20965 Tooltip easily loses its place""

sdk commit: RallySoftware/appsdk@27c771b0ef6882b14aa69e8abd49644406132480
author: Dave Thompson
message: Revert "Revert "Revert "DE20965 Tooltip easily loses its place"""
S65961: update IterationTrackingBoardApp to no longer build models and use the TreeStoreBuilder for building out the grid