Exclude grayscale from selection (#3445)
Exclude grayscale from selection (#3445)

- Do not consider grayscale as option in selection as it would make it less visible.
- Resolves #1020
alexanderby/darkreader,darkreader/darkreader,darkreader/darkreader,darkreader/darkreader,alexanderby/darkreader,alexanderby/darkreader