[LyX/master] Start reporting missing citations and broken references in LaTeX build.

[Daniel]

On 2020-03-14 09:32, Jürgen Spitzmüller wrote:
> Am Samstag, den 14.03.2020, 09:13 +0100 schrieb Daniel:
>> For me, incorrect references are basically the only point where
>> using
>> LyX/LaTeX is worse than a WYSIWYG word processor because in the
>> letter
>> you are able to more easily spot them in context. Broken and wrongly
>> formatted references are one my major source of handing out mistaken
>> documents. So, every help I can get to recognize those is very
>> welcome.
> 
> We could easily color undefined references in the workarea. This would
> be easily detectable and would not annoy people who use documents in
> different output routes (or want to work on subdocuments standalone).

Great. (Just for reference: This was part of the suggestions of the rest 
of my post.) I think that would be helpful.

However, depending on how large the document and how many sub-documents 
there are, it might still be asking too much that the user should scroll 
through all those documents. So, some kind of comprehensive reporting 
could still be helpful.

Daniel