writerfilter: RTF import: ignore content of \upr, except for \ud

The content of \upr and its nested \ud destination should be the same
modulo text encoding, so ignore the legacy one.

Change-Id: I007151e3075a9ac879a486ec3b5fb8549435dbba
vcl: evidently a little more type safety is required here

MultiSalLayout::AdjustLayout() crashes with mangled stack.

(regression from 2b8528a2745bec7909bfe2265d6110a9964eef47)

Change-Id: I20b7980dd89dd1b72063c2187ac3a4735babc4c4
fdo#81944: writerfilter: RTF import: don't drop fonts in stylesheet

The font definitions in the style sheet meet an untimely death in
StyleSheetTable::lcl_sprm(), which special-cases LN_EG_RPrBase_rFonts,
routing it into TblStylePrHandler.

Avoid this by sending style entries to the domain mapper in the same way
as the OOXML tokenizer, i.e., with paragraph and run properties nested
below CT_Style_pPr/rPr.

This reveals that the CT_Style_basedOn was wrongly handled as paragraph
property.

Change-Id: Ic724ba48fe36bf782b1b430bdafdb1df480d5ad3