insights: LineChart Y axis labels don't resize when data updates

Created by: chwarwick

The labels on the Y axis for line charts do not resize when the data updates in the chart which causes the values to become cut off. This was observed testing the polling changes to when insights are backfilling. The initial (empty) results with have a Y axis with single digit length; however when the data was updated via a polling the Y axis values would change but the labels would be cut off.