Changelog:

Changelog:
* QDialogView.h: interface methods and slots are now public instead of protected. This allow to avoid making friend classes.
* QPrefs.[Ch]: removed everything GUI related. The controller does not know anything about what the Dialog is doing, it is here only to transfer request one way or the other.
* QPrefsDialogs.[Ch]: transfered everything GUI related here. Things are gathered per module in contructor, apply() and update() methods so that it will be easy to transfer code to separate class afterward
  - QPrefsDialogs::apply(LyXRC & rc): fill in rc parameters from GUI.
  - QPrefsDialogs::update(LyXRC const & rc): update GUI from rc parameters.

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@13453 a592a061-630c-0410-9148-cb99ea01b6c8