appsdk-bump-app-catalog 30 bumping sdk to 2548-20e17de

sdk commit: RallySoftware/appsdk@20e17decd4e0035b8f684490133e46d0ac86a7ca
author: Robert Everett and Ronn McQueen
message: Revert "Revert "DE21118: FIX: Loss of highlighted text in card editor""