FR: UI for Internal Parameters named ranges

[X-Raym]

Hi,

Currently, internal parameters can only have ranges names via Lua code

mode = {
    index = 2,
    name = "Mode",
    value_count = 2,
    value_labels = { "Off", "On "},
}

It would be nice to have a button for this, with a minimalist input (like a multiline inbox for eg, one line per named ranges. Ranges would be all the same size, aka 100 / number of param names).

This would work nicely with #579

Thx!