Optional image selection for Reference/Background objects

Currently, when adding "Reference" or "Background" objects (shown below), it immediately takes you to the file browser, where you are required to pick a new image file to add to your .blend file. In most cases, this is ideal as often you are bringing in a new image file.

But what if the image datablock is already in the .blend? Or maybe the image is packed (for example, you pasted the image from a website, or you painted the image in Blender), so there is no external file. And yet, you have to pick an image in the file explorer for the operator to add a reference object at all.

To workaround this, you open the file browser, pick a random arbitrary image so the object is made, go into the object's data properties, and switch the image datablock to the one you want.

I suggest a new menu option or operator parameter where you could either pick an existing image datablock, or add a reference object without an image so users can set the image afterward without loading in another image.