Fix a hover bug in the heatmap
Fix a hover bug in the heatmap

Use the id property on data objects instead of the selection index
to identify the correct row to highlight because sorting the
selection messes up the row numbers.

unicef/polio,SeedScientific/polio,unicef/polio,unicef/rhizome,unicef/rhizome,unicef/rhizome,SeedScientific/polio,SeedScientific/polio,SeedScientific/polio,SeedScientific/polio,unicef/polio,unicef/rhizome,unicef/polio