As part of MGNLEE-454, default magnolia.properties were duplicated into ee-pro-webapp sources—for the sake of using the MagnoliaProWidgetSet.

This means all changes on the empty-webapp's default config would have to be replicated there. This is not sustainable, living proof being that in a couple months time, it already diverged with respect to 1. default directory for FS resources and 2. still using derby config instead of H2.

This must be done at build time instead.
Default magnolia.properties need to be extracted from the empty-webapp's war artifact, and patched in the maven ways.