This patch adds two new underlining styles:
- BOLDWAVE: a thicker version of the default WAVE style
- BOLD: a thick straight line

No default setting changed. It's up to the grammar checkers to specify
the underlining style they want.

This contribution to LibreOffice is licensed under the MPLv2/LGPLv3+ dual license.

modified :         include/vcl/outdev.hxx
modified :         offapi/com/sun/star/text/TextMarkupDescriptor.idl
modified :         sw/source/core/inc/wrong.hxx
modified :         sw/source/core/txtnode/fntcache.cxx
modified :         vcl/source/outdev/textline.cxx
modified :         vcl/workben/outdevgrind.cxx

Change-Id: I5629253905ba40c51cc748a7ceeb84170ef5d94c
Reviewed-on: https://gerrit.libreoffice.org/73412
Tested-by: Jenkins
Reviewed-by: Michael Stahl <Michael.Stahl@cib.de>