Mkvbatchmultiplex

- Re-write of MKVBatchMultiplex
- Use a dark theme on Windows 10
- Add rename for output files
- Jobs table with jobs management
- Add Spanish Interface

.. Hyperlinks.

.. _Plex: https://www.plex.tv/

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Changed
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- locale updates
- Check Files displays files read from the source directory. Also the contents
of the destination directory for debug purposes.

Fixed
~~~~~

- python wheel distribution not working
- system tray icon not showing on macOS

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Added
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- show progress bar on Windows taskbar icon
- view log on optional tab

Changed
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- configuration now is a dialog for better compatibility with macOS
- use natural sort when reading directories

Fixed
~~~~~

- Fix BUG 1 force escape quotes for mkvmerge executable in Windows
- Fix BUG 3 title of first episode propagating to all episodes
- dummy progress bar icon function on macOS was not working
- removing configuration elements not always working
- spanish locale fixes

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