I got stuck with the disappearing spell right click menu. I went looking for the spelldisplay xml in the default UI folder and it's not there. I haven't touched any of the files in that location.
If you are missing any default file, make sure the EQ updater runs. If for some reason you do not get the file, go into Advanced and do a Complete file Check. It will auto download EQUI_SpellDisplay.xml for you.