Make some labels to be more correct.
Temporary Windows:
"Full Screen" to "Maximized Area" in the Temporary Windows prefs.
Renamed the "Temporary Windows" to "Temporary Editors". Temporary windows is just one of the possibilities there,
the choices are really about what happens to temporary editors.
Statistics:
"Verts" to "Joints" in the Armature statistics.
Close file dialog:
Keep the ".blend" file extension so it's more obvious that this is the file name.
Use "image(s)" instead of "image"/"images" (see rB01c824ac88a0).
UI Line Width (Thin, Auto, Thick):
Used "Default" instead of "Auto", as it is more correct; Thin and Thick also automatic, and not some fixed.
Also the tooltips for Thin and Thick refer to some "default". (Initially it was "Default" in D2778.)
File menu:
"Purge All" to (Clean Up) "Unused Data-Blocks"