Add option to replace a single cover art image in place (without changing displayed order) by selecting image file from directory.
I propose adding "Replace" to the list of options available from the right mouse button context menue for cover art:
Add cover...
Remove cover
Replace cover...
Extract cover...
Adjust cover
Example: I have images installed for Front Cover, Back Cover, Leaflet (multiple leaflet images). I want a file selection dialog to replace Front Cover without changing the order of images.
Alternatively: A dialog box for dragging images into any order.