[solved] Themes and Archiving in 1.7.2

on the test instance at https://try.gitea.io/ I am able to change the theme from gitea to arc-green. However, when I look for this option on my own instance (version 1.7.2) I cannot find it. The same takes effect for archiving repositories. It works on the test instance, but it is missing on mine.
Is there anything I have to do to enable these features?

try.gitea.io is running the bleeding edge commit. There have been close to 250commits to master since 1.7.2 was released.

Edit: those two features will be released in 1.8.0