Catalyst/Cinema Exporter GUI usability improvements
fixes #18952 (closed) fixes #18487 (closed) fixes #18987 (closed) fixes #19010 (closed) fixes #18949 (closed) fixes #18948 (closed)
fixes #18952 (closed) fixes #18487 (closed) fixes #18987 (closed) fixes #19010 (closed) fixes #18949 (closed) fixes #18948 (closed)