Refactored due to changes in spreadsheet-js
Added a redraw timeout to highcharts as it turned out to be cpu consuming to
redraw on every valuechange event

Change-Id: If7a63982c720bf1900fad9dcd952203180f670de
Merge "Refactored due to changes in spreadsheet-js Added a redraw timeout to highcharts as it turned out to be cpu consuming to redraw on every valuechange event"