Reset all Visuals to default formatting

My objective is to retroactively apply a Custom Theme to existing PBI reports. 

If the existing report has manually changed formatting properties e.g. colors, fonts, borders, etc. then when a Custom Theme is applied... the those manually changed properties will not be updated to match the newly applied theme.   You could manually select each visual and the go through all the all the properties and manually use the 'Reset to Default' option.  But that would be a tedious and error prone activity.  I'm wondering if there is any way to do a batch 'Reset to Default' for all visuals in the entire report?

You can slightly improve the brute force method by selecting Visuals of the same type, and then you can at least batch update each setting for that set of Visuals (but doesn't work for if different Visual types are multi-selected).