DEV: Plugin api function to add saveable user fields (PR #10774)

I need a new column in a plugin. Instead of a custom_field, I have added a column to user_options. Right now there is no way to save new fields in user_option added from a plugin. I don’t see why these arrays would be defined inside the save function anyways, so this seems like a win-win.


This is quite nice. :+1: