Added a public API to get an EventCellReference for the most recent
fired event. Also EventCellReference now contains information on Grid
section and some related helpers.
Change-Id: Ia8a166da6f322084d65f9b1cb242e22b0e66e53b
Fixes several issues with hidden columns in Grid (#17023)
Makes sure that hidden columns are taken into account when calculating indices.
This is because escalator doesn't know about hidden columns, thus need to
convert cell indices to actual column indices in quite many places.
Change-Id: I4c0f3097938ee9340a1922464e12ad7261084ecb