1) when a zone is clicked in the map, the corresponding line is toggled (highlighted or unhighlighted) in all charts. Consecutive clicks on different zones make all those zones highlighted in the charts.
2) when brushes are used to filter data in one chart, the selected zones are also highlighted in the other charts.
The features implemented in https://github.com/gem/oq-platform/pull/594 (addressing https://github.com/gem/oq-platform/issues/596) require additional selenium tests. In particular, we want to test that:
1) when a zone is clicked in the map, the corresponding line is toggled (highlighted or unhighlighted) in all charts. Consecutive clicks on different zones make all those zones highlighted in the charts.
2) when brushes are used to filter data in one chart, the selected zones are also highlighted in the other charts.