[LyX/master] Fix backspace deletion of selected items with change tracking

[Kornel Benko]

Am Mon, 13 Jan 2020 13:04:55 +0100
schrieb Jürgen Spitzmüller <spitz at lyx.org>:

> Am Montag, den 13.01.2020, 12:08 +0100 schrieb Jürgen Spitzmüller:
> > Am Montag, den 13.01.2020, 11:32 +0100 schrieb Kornel Benko:  
> > > For instance for export/tabletemplates/Grid_with_Head_1x2_dvi
> > > 
> > > lyx: SIGSEGV signal caught!  
> > 
> > JMarc, this looks like yours:  
> 
> This should be fixed. JMarc, please check if it makes sense to you.
> 
> Jürgen

This is much better. But now, some exports used too much time. Others still fail.

ctest -R dvi
96% tests passed, 39 tests failed out of 925

Long time:
923/925 Test #3091:
export/doc/ru/Tutorial_dvi3_systemF ..........................................................................................***Failed
469.55 sec
925/925 Test #2595:
UNRELIABLE.VARYING_VERSIONS_export/doc/he/Tutorial_dvi3_systemF ..............................................................***Failed
427.54 sec

One of the other failing is:
	export/examples/de/Modules/Linguistics_dvi3_systemF

But this may be due to updated TL19. The error I see:
...
LaTeX Info: Redefining \rmfamily on input line 23.
LaTeX Info: Redefining \sffamily on input line 23.
LaTeX Info: Redefining \ttfamily on input line 23.
...texmf-dist/tex/luatex/luaotfload/luaotfload-features.lua:252: bad argument #1
 to 'stringgsub' (string expected, got boolean).
<to be read again> 
\scan_stop: 
l.23 ...n,spelling=new,babelshorthands=true]{german}
                                                  
The lua interpreter ran into a problem, so the
remainder of this lua chunk will be ignored.


! Package fontspec Error: The font "FreeSerif" cannot be found.
...

	Kornel

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