Optionally show path for configuration options

[fredden]

I've set the default to be off, but can trivially set this on by default by creating a etc/config.xml file with this set on if you would prefer.

[avstudnitz]

@fredden Thank you, looks good! Please set the default value to "on" as it's one of the most used features of this module, and I don't want to confuse people if they update and suddenly the path is not shown any more.

[fredden]

I've made this change and tested again.