Highlight errors in Gen2 dataflow

In the Power Query interface for Gen2 dataflows there is no way to easily spot errors in the data.  If you've got lots of columns in a table you need to scroll through them and examine the contents to try to find the errors.

Please provide a simple indicator in the UI to address this.

Something like a warning message in the footer of the UI that says "Error in Column(s)".  Then allow the user to hover over this to see a list of columns that have errors.