I would like this feature as well. I can't believe you didn't add this to 4.0.
Going outside the program to eject the media you saved to is a hassle after you're used to not having to do it (Cura).
I thought for sure they were going to add this for 4.0, there solution is to use the more advanced FREE programs for a work reach around, they didn't even add the eject button for your SD card like the others have.....REALLY