Navigation portlet indentation level is fixed after 1st nesting level

[fulv]

Navigation portlet indentation level is fixed after 1st nesting level

What I did:

1. Create at least two folders, one inside the other, and a leaf item in the innermost folder, e.g.: /Members/jblow12345/2017/q1/1st-q-2017-statement-12345.pdf
2. Navigate to the leaf item (the file 1st-q-2017-statement-12345.pdf, in my example)

What I expect to happen:

The navigation portlet should indent each successive level of nesting further to the right, or otherwise indicate the nesting structure, perhaps with successively smaller fonts (just an example).

What actually happened:

After the first level of nesting, all further levels have the exact same indentation, and look like they are all elements of the first level folder.

What version of Plone/ Addons I am using:

Plone 5.0.6

Screenshot

The following screenshot shows the navigation portlet when I'm on /Members/jblow12345/2017/q1/1st-q-2017-statement-12345.pdf/view:

[MrTango]

This is still the case in current 5.1.3 release.

[petschki]

anybody willing to review my fix here https://github.com/plone/plonetheme.barceloneta/pull/156 ?