'Add new page' does not show pretty name of prototypes

The list of prototypes in the 'Add new page' window shows the JCR node name of each prototype page instead of its pretty name. The 'Page Settings' window does show the correct pretty names.

Steps to reproduce:
1. login to the archetype CMS
2. edit the channel
3. click 'Pages' > 'Add new page'

Expected: the list of 'page templates' shows the pretty name of each prototype (comparable to the list of prototypes in the 'Page Settings' window
Actual: the JCR node name of each template is shown