Save on save

[Pavel Sanda]

On Fri, Mar 20, 2020 at 11:15:11AM -0400, Richard Kimberly Heck wrote:
> I looked briefly at this. I think we would need to check that
> Buffer::isClean is not used for otherpurposes, or else introduce some
> other Buffer::canSave method for this purpose.

I guess we would need some new state, which would allow icon to have
indication that save is possible but not needed.

That's at least what I see with libre office (open office I tested
here behave as nowadays lyx).

Pavel