Actual patch contributor wants confidentiality to avoid leaking
proprietary information or whatever (I am not sure either what to be
scared of as it's all good and harmless to me, but let's respect the
request). See also #4246 for more details.
(cherry picked from commit 370499676f)
Though the bug was mostly fixed, it seems to still happen on Windows XP,
where apparently no content type had been registered for SVG.
GTK+ developers don't seem too keen to patch GTK+ 2.24 for a platform
which they don't support anymore.
Also if not mistaken, GIMP does not officially support Windows XP
anymore either. A patch though has already been provided by Edward E.
and it really doesn't look like it could break anything since it just
adds a last "else if" when everything else failed (and inside a #ifdef
affecting only WIN32 builds).
So let's just add it in our builds at least. We still don't have support
for it, but I see no reason to just refuse a minor patch which won't
break anything else.
... interfere with GIMP UI events
Add a GTK+ patch to ignore top-level transparent windows when
looking for the top-level GDK window at a certain pointer location,
in the Win32 GDK backend.
