Hello,
For me is not quite clear what this button does?
Can you give me an example, pls?
How dangerous could be for an ordinary user?
Best Regards,
-n
The first idea to determine what button does is to click the button 
As an example, if user changed table column widths before, it will be reset to defaults.
Regards
I customized a generic filter with an attribute, I clicked the button and nothings happened. The filter is still the same.
Okay, so is not too dangerous for the user. Possible to revert.
Thank you!