Added shared crosshair to dashboards to track better all graphs, and little Fix for #884
fix tooltip test expecting for stacked data
Merge branch 'add_shared_croshair_to_dashboards' of github.com:toni-moreno/grafana into toni-moreno-add_shared_croshair_to_dashboards
Refactoring and fixes for PR #880
Fixed unit tests for grafanaGraph component
More fixes related to shared crosshair #880