The RMSE Bubble Chart in Builder needs to be a square (preferably responsive), no matter what the screen size. The reason is because in Analytics, a good model tracks the 45 degree angle line (predicted = actual). Currently the size of the chart adjusts, which makes the performance confusing to interpret. It is possible that Predicted and Actual end up having different [min,max] intervals, in which case, to make it a square we need to take the min of min's and max of max's across Predicted and Actual.
