I'm looking for a way to apply a different sort order of the pages in the site tree in the CMS (the site tree on the left under the create, search and batch action buttons). By default this is ordered by the "Sort" column which makes perfect sense. For my project it would be better though to sort pages by a (new custom) field "Date" (in the `Page` database table).
I have been looking through the source code for quite a while now but couldn't find the right piece of code. Does anyone know where I could find this or how to change it?