manually adding elytron reference to properties not working

For instance, after adding an elytron reference directly to ${KARAF_HOME}/etc/org.ops4j.pax.web.cfg:

     keystore.password = CS:keystore.password

The property is not deferenced (e.g. in undertow.xml). The following is stored in the cached bundle:

data/cache/bundle10/data/config/org/ops4j/pax/web.config:keystore.password="CS:keystore.password"

After running the following commands:

   config:edit org.ops4j.pax.web
   config:update

Observe the property is found in the cached bundle (note the addition of _encrypted.):

data/cache/bundle10/data/config/org/ops4j/pax/web.config:_encrypted.keystore.password="CS:keystore.password"