[INTERNAL] sap.m.Column: getLabel added to reveal action designtime
[INTERNAL] sap.m.Column: getLabel added to reveal action designtime

Change-Id: I21c0c480a05e98e3cb21415531626bd214909d9d

SAP/openui5,cschuff/openui5,SAP/openui5,SAP/openui5,cschuff/openui5,SAP/openui5,cschuff/openui5