Fix loading of included translations
Fix loading of included translations

Since usage of GNUInstallDirs, the path to the translations configured
in config.h does not contain the prefix anymore. We should use
CMAKE_INSTALL_FULL_DATADIR to set the I18NDIR path.

cutelyst/cutelyst,cutelyst/cutelyst,buschmann23/cutelyst,buschmann23/cutelyst,cutelyst/cutelyst,buschmann23/cutelyst