I'm looking for a working example of how to sort my pages in the sitetree by title by default. Ideally I only want to sort child pages of a certain type. In my case I want all my Gallery pages under the parent Portfolio to be sorted Alphabetically by their title.
This is for easy searching in the backend CMS as I know how to sort them in the template.
I have found these examples but not enough to work this out for SS3.1+
http://www.ssbits.com/tutorials/2011/custom-sorting-in-the-cms-sitetree/
https://github.com/silverstripe/silverstripe-cms/issues/848