[INTERNAL] sap.ui.commons.Panel: Documentation improved
[INTERNAL] sap.ui.commons.Panel: Documentation improved

Change-Id: I215e65af417754cd86a20ac6d9155f2499bc9715
Signed-off-by: Deyan Yanakiev <2614bfd3515c6c39ab25ed6159ddb09df1e2cc71@sap.com>

cschuff/openui5,SAP/openui5,SAP/openui5,nzamani/openui5,cschuff/openui5,SAP/openui5,nzamani/openui5,olirogers/openui5,SQCLabs/openui5,olirogers/openui5,SQCLabs/openui5,olirogers/openui5,nzamani/openui5,cschuff/openui5,SQCLabs/openui5,SAP/openui5