ext42-appsdk-bump-app-catalog 62 bumping sdk to 134-bb490cb

sdk commit: RallySoftware/appsdk@92ef5850adcf1636bdad5dc5f6d3704c74aa4297
author: Matt Greer and Kevin Roberts
message: DE19482 make sure columns do not have a flex value of "null" which causes layout issues in Ext 4.2