Some files cannot be moved to other folders or projects. For example, I am attempting to relocate the files shown into another project. I am, however, unable to do so. When right-clicked, the move menu does appear. One cannot, however, click on another project to move the file.
I realize that this issue is difficult to communicate, but here is a screen shot, nonetheless.
I was able to move other files within this project to a new one. The files shown all exhibit this behavior.