I can add a folder to the workspace (which doesn\'t seem to do anything, as far as I can tell), but the \"map to file system resource\" option seems to have been removed, and I
As of today, with Chrome Version 63.0.3239.108 (Official Build) (64-bit):
The feature appears to be still broken, not working 'automagically' nor consistently with the previous behavior.
However, adding a folder that reflects the resource's URL as seen in the Network tab, make it work again. So if for instance, in the Network Navigator tab you have:
http://mylocal.site/wp-content/themes/mytheme/assets/sass/partials/_header.scss
You will just need to add the whole wp-content/
folder to the Filesystem tab to get the feature work again as expected.