All widgets copy&pasted the same description, including an invalid reference
to "Layout", which should be "Elm_Layout".
SOME of them had been fixed over the years but this commit fixes all of them.
This significantly reduces the number of Doxygen warnings and adds meaningful
links to the docs.
During the rename this header got lost and distcheck broke for me due to
problems when generating the files from eo. I fixed a similar problem after
the rename ro efl_ui_flip in commit c3c344da41
Subhransu, please keep this in mind when renaming another one so I do not have
to do another of these fixes. :)
Summary: No idea what else can be done with this widget.
Reviewers: jpeg, cedric, woohyun
Subscribers: raster, cedric, jpeg
Differential Revision: https://phab.enlightenment.org/D3930