App settings editor behaviour for device specific settings

I want to support and test different settings for different devices.  

In the resources folder I put the common settings that all devices support.

Then in another folder, call it "resources-newFeat"  I put the settings xml which has expanded settings for a specific device.

My jungle file I have this:

base.resourcePath = resources

fenix5xplus.resourcePath=$(base.resourcePath);resources-round-240x240;resources-newFeat

The problem is that the App settings editor always shows the settings in the resources folder and not the added settings in resources-newFeat.

Is this a limitation of the App settings editor or am I doing something wrong?