The following is regression caused by Issue #15442.

1. Open VA-tests.vizx
2. Drag-select the first 2 bars in the first row.
3. Result: All 3 bars in the first row is selected, which is incorrect.
4. Expected: Only the bars that were drag-selected should be selected.
5. Hover over any of the first selected bar, and wait for tooltip to appear.
6. Result: Tooltip is shown with info only for the hovered bar, which is incorrect.
7. Expected: Tooltip should be shown with info for all selected bars since I hovered over a selected bar.
8. Select "Keep Only" in the tooltip.
9. Result: The resulting Inclusion filter has no values selected, resulting in a blank chart.
10. Expected: The Inclusion filter should have selected values corresponding to the selected bars.