Fix duplicated rows in table widget when using dynamic option
Fix duplicated rows in table widget when using dynamic option

Since right now periodic update will send entire data set instead of
diff. We need to clear table data before adding new rows.

mytestbed/omf,phelipealves/omf,nathansamson/OMF,phelipealves/omf,nathansamson/OMF,nathansamson/OMF,LABORA-UFG/omf,phelipealves/omf,phelipealves/omf,nathansamson/OMF,ardadouk/omf6,LABORA-UFG/omf,LABORA-UFG/omf,maxott/omf6,nathansamson/OMF,ardadouk/omf6,mytestbed/omf,nathansamson/OMF,mytestbed/omf,mytestbed/omf,LABORA-UFG/omf