Feature Request: Add default muxing setting for Video/Container files
Opening any file whether it be a subtitle file, a video file or an audio file will always prompt the user what they want to do which slows down how fast people can use the software. While you can set e.g open new multiplex settings as the default for all files, that is likely not going to be helpful as most users do not want to do the same thing with every file they open with MKVToolNix.
Most users are adding a video file or container first, as a new multiplex window, then adding other tracks such as audio, subtitles, chapters... which they want to add to the current multiplex settings.
A setting to set the defaults for video/container files only would be very helpful as users could set it so e.g a mkv file always opens new multiplex files, and other files always add to the current multiplex settings. This would save a lot of time.