Folders in Binder/Outliner view

I like to view my Binder and Outliner folders with subfolders above documents: that is, collected at the top of the list, with unfiled documents/scrivenings below. (I live to file and categorize.) I know I could manually move all my folders up the to the tops of these folders, but is there a preferences setting or an automatic way to do this across all my projects’ folders?