Submerge 3.5

- Support for macOS Mojave and Dark Mode.
- Notarized by Apple to make sure it's secure and free from malicious code.
- FFmpeg updated to the 4.0 "Wu" release.
- New 4K export presets for H.264 and H.265 (HEVC).
- Replaced some deprecated FFmpeg API's for better performance and stability.
- Metadata is now fetched from The Movie Database (TMDb).
- Now better handles subtitle files with extra empty lines and spaces.
- iTunes Timed Text parser now reads the time codes correctly.
- Various bug fixes and "under the hood" improvements.