appsdk-bump-app-catalog 260 bumping sdk to 1413-6a8db7a

sdk commit: RallySoftware/appsdk@18278861120ec5e4cf96a2972d6d9932ddc6b35a
author: Matt Parrish and Will Klein
message: S56650: Add 'Copy Tasks From' to gear for top level items

sdk commit: RallySoftware/appsdk@b045b1fc200001777e02395556978cc6a4a6ddb0
author: Matt Parrish and Will Klein
message: S56650: Fix jshint failures

sdk commit: RallySoftware/appsdk@6a8db7a798de4429c39d6db2abce283c6aea1f15
author: Matt Parrish and Will Klein
message: S56650: Fix regex-check failure. Change to how we invoke the page refresh forthcoming.