appsdk-bump-app-catalog 580 bumping sdk to 2148-a008673

sdk commit: RallySoftware/appsdk@2cc586b300b875615b98fb008e36aa86c4324fe5
author: Brandon Fryslie and Robert Everett
message: Revert "Revert "S61846: text alignment of column headers: fix ColumnBuilder to work with composite model""

sdk commit: RallySoftware/appsdk@a008673ba6e28411ed0d65438fd127e23d6a2e60
author: Brandon Fryslie and Robert Everett
message: Revert "Revert "Revert "S61846: text alignment of column headers: fix ColumnBuilder to work with composite model"""