Work in progress to allow for editing of read-only documents

[Stephan Bergmann]

Hi all,

Just a heads up on the attached 
0001-Work-in-progress-to-allow-for-editing-of-read-only-d.patch.  Its 
commit message gives a rationale for what I aim at with the patch, but 
also explains why its not yet ready for prime time.

Nevertheless, I would appreciate it if people versed with the details of 
the various applications could give it a try, to see whether it breaks 
any obscure behaviour.  (For example, there is reportedly already some 
support in Writer for editing form content of r/o documents.  Does this 
patch affect that?)  The patch looks rather short, but I struggled with 
it on-and-off over the course of several weeks, as every little change 
triggered unexpected changes in other, seemingly unrelated areas.

I'll try to get the Calc (and other applications?) problems fixed as 
soon as possible (I only noticed that problem now that I thought I was 
mainly done, but had only ever tested my changes with Writer), but am 
reluctant to press this into master towards LO 3.6 so short before 
feature freeze.  Experience won over the last weeks indicates that too 
many surprises lurk in this area.  So I would really like to hear other 
people's thoughts.

Thanks,
Stephan