Option to allow ui.statusline.[mode] to color the entire statusline

[dsvoid]

I feel that I could benefit from ui.statusline.normal, ui.statusline.select, and ui.statusline.insert coloring the entire statusline, rather than just the mode indicator.

When I switch back to the editor after a period of inactivity, I sometimes forget the mode I'm already in. In my theme, I've manually set a color for each of the modes to make it more apparent which one I'm using, but it is a relatively small color change compared to the color of the entire statusline. I believe it may be convenient to allow the mode color to apply to the whole statusline.

A new option (named color-statusline-using-mode in this example) under [editor.statusline] might accomplish this:

[editor.statusline]
color-modes = true
color-statusline-using-mode = true