The hint text shows "Apply the configuration changes to the report" but the label says "Find". The changes are not applied, instead the dialog is closed, so the button probably is a "Find" button that has no real purpose here. Ver 5.0.1 openSUSE Tumbleweed
I discovered this on a Net Worth Graph and it took a while for the changes to apply, so the button does appear to work as an "Apply" button, although I don't think it should close the dialog when pressed, and definitely shouldn't say "Find".
There is no "Find" button in master branch.
*** Bug 406011 has been marked as a duplicate of this bug. ***