* Status.15x: updates.

* Status.15x: updates.

* buffer.h: changed() signal do not have an argument now.

* BufferView.C:
  - setBuffer(): changed update() call to updateMetrics().
  - update(): sanitize how the flags are used.
  - scrollDocView():  add a call to updateMetrics() at the end.

* LyXFunc::dispatch(): adjust changed() signal emission.

* LyXText/text3.C:
  - cursorPrevious(): delete BufferView::update call; adjust cursor flag.
  - cursorNext(): ditto.

* frontends/LyXView.C: adjust Buffer::changed() signal connection.

* frontends/WorkArea.[Ch]:
  - redraw(): no need to re-update the metrics if we don't change views.

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@15997 a592a061-630c-0410-9148-cb99ea01b6c8