change for all text
- group intrinsic actions of language change for all text into one Undo action
- secure <SwRootFrm::CalcRects(..)> - catch NULL pointer
- correct <CursorGuard> - really restore the cursor
(cherry picked from commit 4207db473430e02a65a5f4d57db6e46a8db29a19)
Conflicts:
svl/inc/svl/undo.hxx
svl/source/undo/undo.cxx
sw/inc/IDocumentUndoRedo.hxx
sw/source/core/edit/edundo.cxx
sw/source/core/inc/UndoManager.hxx
sw/source/core/layout/trvlfrm.cxx
sw/source/core/undo/docundo.cxx
Change-Id: I972988bbc21a519e0956ff196aa93a46287b9a2e