Adapt stdinsets.inc and linguistics.module to the new InsetLayout framework.

Adapt stdinsets.inc and linguistics.module to the new InsetLayout framework.
There may be some other changes to be made here still, but they should be
fairly painless. What will need checking are InsetFlex's. Those that set
MultiPar to true will now default to ForcePlain false and CustomPars true;
those that set MultiPar to false (or don't set it, since that's the default)
will have CustomPars false and ForcePlain true. If that's wrong, the right
tag can be added, but it must be AFTER the MultiPar tag, since MultiPar will
reset CustomPars and ForcePlain, as described in stdinsets.inc.

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@26759 a592a061-630c-0410-9148-cb99ea01b6c8