QET_MIME_PACKAGE_PATH was "../share/mime/packages/", a path relative
to CMAKE_INSTALL_PREFIX. This only worked by accident with the old
default prefix (/usr/local -> ../share resolves to /usr/share/mime,
the conventional system location regardless of app prefix).
With -DCMAKE_INSTALL_PREFIX=/usr (as used by Debian/Ubuntu packaging),
the same "../share" escapes /usr entirely, landing at /share/mime
instead of /usr/share/mime, which breaks dh_install (file not found
under usr/) and would silently install the mime package definition
outside any path desktop environments actually scan.
Drop the "../" so the mime package path stays under the install
prefix, matching standard practice (/usr/share/mime/packages or
/usr/local/share/mime/packages).
QET_LANG_PATH was "l10n/" for WIN32, a value that appears nowhere else in
the tree: the MSI shortcuts pass --lang-dir="[INSTALLDIR]lang/", and the
windows-build workflow copies the .qm files into files/lang/. So the
compiled-in default pointed at a directory no packaging creates, leaving
the command-line argument to do all the work.
Align it with what is actually shipped, so the binary-relative lookup
added in the previous commit can find the translations on its own.
Those desktop MIME types were needed only with KDE up to 3.x, as it
used to have its own desktop-based MIME type system. KDE 3 is EOL for
many years now, and there are already XDG MIME types.
These files are the bare XML definitions, and they are automatically
generated by update-mime-database (part of shared-mime-info) on update
(e.g. by distro hooks) or manually. Keeping them in the sources, and
installing them, is definitely not correct, as qelectrotech.xml is
their canonical definition.
Hence, drop them from the sources, together with references to them.
Laurent Trinques