Display image styles shouldn't be required

+1 for this one
I also need the functionality for CK5 - the dropdown of available styles should not be empty not to force production the remember about selecting the image style. I reviewed CK5 documentation for dropdown unfortunately I can not see any option to do that. Anyone has any idea how to handle that in CK5?

Finally I was able to figure out by my self and my lama JS skills. Attaching patch for version 3.x CK5 & D10.
What the patch is doing:
When there is only one image style available on the dropdown list, automatically select it. This way production team do not have remember about it.
Feel free to contribute and make it better. Thank you.

Patch committed, thanks @Piotr Pakulski!

Automatically closed - issue fixed for 2 weeks with no activity.