appsdk-bump-app-catalog 304 bumping sdk to 1546-1b77951

sdk commit: RallySoftware/appsdk@8bebdd9962b597dd9e51181b6b9d438c491c4a83
author: Dave Thompson
message: S61176: Refactor app settings.

sdk commit: RallySoftware/appsdk@eb93917e1271165642ec420d10050188456875c4
author: Matt Greer and Doug Diehnelt
message: S60642 TreeGrid profiling. Updated ClientMetricsBuilder to listen to fireEventArgs, and added test for fireEventArgs ClientMetricsBuilder

sdk commit: RallySoftware/appsdk@c4b03ee7157920502845a6990b11c41eba9cf2e9
author: Kyle Morse
message: DE19958: weird treegrid locking issues when doing crazy dupe node reparenting

sdk commit: RallySoftware/appsdk@0daf8085b8c1d75acd518cfdadaaa884686248e0
author: Kyle Morse
message: Fix broken links in promises guide

sdk commit: RallySoftware/appsdk@1b77951f9bde0b12c8bfab13b01050843fa0014f
author: Matt Greer and Doug Diehnelt
message: S60642 Profiling TreeGrid. Fixing JS lint whitespace errors.