Data Explorer: Ability to quickly check for duplicates

[werkstattcodes]

Hello!
It would be very handy to have a button/method in the data explorer which checks if there are any duplicates in the presented data.
The button could check for duplicates across all columns (i.e., the rows are identical across all variables) or only for specific columns (.i.e. identical only in a specific variable, e.g. id).
Clicking on the button would reveal those rows which are duplicates.
In my mental map it would basically integrate a quick janitor::get_dupes() query.
Thanks!

[juliasilge]

Thanks for this idea! I have opened #10534 to track and prioritize this feature request.