reference sequence setting to reduce redundant amino acid representations?

I just discovered this by chance and like it a lot. I was wondering what you think about a feature that would set the first sequence as reference sequence and then further reduces all agreeing positions in the MSA to "." in the viewer? Maybe I also missed this in the configuration settings.
So essentially, only show mismatches. 

Anyway, this would help a bit to remove clutter in these scenarios.