Custom MPV options

[brainrom]

KokoVP should be able to supply custom options to mpv and have a GUI to configure it.

Concept:

1. Table view with option strings and checkboxes to enable/disable option without deleting it
2. Buttons only to add new /delete selected option. Rearrangement with drag-n-drop.
3. Store options as a plain text file, where line staring with # will be disabled
4. (Maybe) allow to have an options presets, using different files in one directory. Name of the file is the name of the preset. Preset should be selected using combobox, combobox should be auto-populated with the presets' files.

[adolfotregosa]

I like option 4

[brainrom]

It's all the items of one concept.