Blender Git Loki

Additional Waveform Drawing Mode

This diff adds a 6th drawing mode to the Waveform Scope.

The new mode shows the RGB colour channels overlaid as a "Full colour" waveform.

The old "Red Green Blue" mode is renamed "Parade" which is the standard industry
term for RGB channels shown side-by-side.

This full colour style of waveform is very much more useful for colour grading than the
Parade mode and is the default waveform for many artists.

Files from older Blender versions which show scopes open as expected.

Patch by John Cox (johnedwardcox), thanks!

Reviewers: sergey

Reviewed By: sergey

Subscribers: campbellbarton, tmw, Blendify

Differential Revision: https://developer.blender.org/D1936