download datasubset in excel

The Excel Tools plug-in has both "export CDT to excel" and "export SQL to excel" which, though deprecated, both still work (i've confirmed in Appian 20.4 with the latest version of the plug-in).  It's usually not advised to intentionally use deprecated functionality like this, but in this case, Appian has provided no functionally equivalent replacement and so far there is no word on anything forthcoming, so I consider it "fair game" to use the deprecated functionality that worked perfectly fine as it was.