Paper package overrides paper size when it should not

[lasgouttes]

Andre' wrote:

Try

layout-> document->paper, special "very small margin".

Ok.

layout-> document->paper, A5

Gets accepted, but the the .tex contains "a4wide" and no "a5"
whatsoever.

[lasgouttes]

This stuff is completely broken: in FormDocument, the
paper package choice is disabled when paper size is not A4 (so paper
size has priority). However, in BufferParams::setPaperStuff, the paper
size is set to a4 when a paper package is in use (so paper package
have priority!).

So I cannot propose a simple fix, since one needs to seriously think
about what we want.

[Juergen Spitzmueller]

fix for the xforms frontend

[lasgouttes]

Applied to trunk and 1.3.x branch