i29105 when a page background garphic is set in sw, use GlobalRetoucheColor as fallback for draw object text edit

123462 - Writer's Formatting Aids option page - guard access to <SwWrtShell> instance as this is not available in Page Preview

Found by: Matthieu Riolo <matthieu.riolo@adfinis-sygroup.ch>
Review by: Matthieu Riolo <matthieu.riolo@adfinis-sygroup.ch>

Found by: potassium19
Patch by: hdu@apache.org
Review by: orw@apache.org

123444: method <SwXTextDocument::getRendererCount(..)> - clear of rendering data before determine needed <SwView> instance

Author:Christina Roßmanith

i123350 Added Clear() implementation to SdrUndoManager to only delete text edit part of the undo stack

Patch-By: motohoss <hcmmac@hosscomm.com>.
Reviewed-By: jza

also prevent derefencing of an iterator after it has been erased

- method <SwTxtAttr::RstAttr(..)> - correct consideration of parameter <bInclRefToxMark> used by Undo to fix 121897

i115391 corected from isLocked to IsPasteResize which was used in modifiers for CustomShape and TextShape

#123283# improve finding default office path for Mac (no /usr/bin/soffice link), on Windows drop unoinfo and use the path from the registry directly

- assure certain order on export for former versions
- assure certain order on setting these properties on import to be independent of order in ODF

but force it, if formatting code contains string/text section

Review by: Clarence Guo <clarence dot guo dot bj at gmail dot com>

Patch by: Herbert Duerr
Scenario found by: Thorsten Wagner