The components menu entries never got implemented for the gtk editor mode
and probably never will, given their limited utility. The object list
pictures are simply broken.
This time with more manual checking and using git blame -M -C, so that
a few cases of copied code get a copyright notice corresponding to
their initial introduction.
This is a whitespace-only patch. Hopefully, it'll only affect rarely-changed
parts of the engine, since all regularly maintained pieces should already
use tabs.