[LyX/master] Add "full" drawing strategy

[José Matos]

On Tue, 2024-06-11 at 18:06 +0200, Jean-Marc Lasgouttes wrote:
> This is a good question. As it is, it will fall back to the default 
> value ("partial" if supported, "backingstore" otherwise) if it does
> not understand the value that was given (I just checked). The only
> harm is a warning on the console.
> 
> JMarc

So this is the auto setting that I referred in the other sub-thread.
😀️

Could there be some "property" information tab? I say this because
sometimes the console (stderr) is not the best place to put this
information for easier debugging. This does not need to apply to all
properties but this is one that we deem as important.

I am aware the we can use the progress/debug tab...
-- 
José Abílio