Problem with horizontal space in List of Figures

[Robert Blackstone <blackstone.robert@gmail.com>]

Dear list,

Using Hans' nice method to place in a document several figures with the same number, separated by text or on different pages, I run into difficulties with the List of Figures.  Apparently ConTeXt does not make enough space to accommodate the figure numbers and the groupsuffix, as the example shows. (Sorry for the large number of figures but I needed a double digit number of them to show the problem. None of the other elements, titles, captions etc. has any significance for this problem.)

In this problem the chosen font, Verdana, seems to be an essential factor. With many sans fonts there is no problem, for example not with Iwona, Arila, Helvetica, Calibri. Optima, Trebuchet MS. But others, for example Lucida Sans and Sathu give the same problem as Verdana.
Unfortunately I have to use Verdana for my project. 

What can I do to create a little more space for the first column of the List of Figures?
Thanks in advance for any advice.

Best regards, 
Robert Blackstone 

ME:
------------------------------
\useMPlibrary[dum]

\usemodule[simplefonts]
\setmainfont[Verdana]
\setupbodyfont[9pt]	
	
\starttext

\completecontent
\completelistoffigures[label=yes,alternative=c]

\startchapter[title={Introduction}]

\input knuth

\startsection[title={This is a section}]

\input ward

\stopsection 

\startplacefigure[location=here,reference=,title={A1},group=,groupsuffix=.a]
{\externalfigure[dummy][height=2cm]}
\stopplacefigure
Some text.
\startplacefigure[location=here,reference=,title={A2},group=,groupsuffix=.b]
{\externalfigure[dummy][height=2cm]}
\stopplacefigure

\startplacefigure[location=here,reference=first,title=three]
   \externalfigure[dummy][height=2cm]
\stopplacefigure

\startplacefigure[location=here,reference=third,title=four]
   \externalfigure[dummy][height=2cm]
\stopplacefigure

\startplacefigure[location=here,reference=second,title=B1,group=alpha,groupsuffix=.a]
   \externalfigure[dummy][height=2cm]
\stopplacefigure
Some text.
\startplacefigure[location=here,reference=fourth,title=B2,group=alpha,groupsuffix=.b]
   \externalfigure[dummy][height=2cm]
\stopplacefigure

\startplacefigure[location=here,reference=,title={This first example 6 has an already very long title and the following one will be even longer.},group=Zero,groupsuffix=.a]
{\externalfigure[dummy][height=2cm]}
\stopplacefigure

\startplacefigure[location=here,reference=,title={This second example 6 has a very substantially longer long title and the following ones could not possibly be longer.},group=Zero,groupsuffix=.b]
{\externalfigure[dummy][height=2cm]}
\stopplacefigure

\startplacefigure[location=here,reference=third,title=seven]
   \externalfigure[dummy][height=2cm]
\stopplacefigure

\startplacefigure[location=here,reference=first,title=eight]
   \externalfigure[dummy][height=2cm]
\stopplacefigure
 
\startplacefigure[location=here,reference=second,title=C1,group=beta,groupsuffix=.a]
   \externalfigure[dummy][height=2cm]
\stopplacefigure
Some text.
\startplacefigure[location=here,reference=fourth,title=C2,group=beta,groupsuffix=.b]
   \externalfigure[dummy][height=2cm]
\stopplacefigure

\startplacefigure[location=here,reference=,title=D1,group=gamma,groupsuffix=.a]
{\externalfigure[dummy][height=2cm]}
\stopplacefigure
Some text.
\startplacefigure[location=here,reference=,title=D2,group=gamma,groupsuffix=.b]
{\externalfigure[dummy][height=2cm]}
\stopplacefigure

\stopchapter
\stoptext
------------------------------------------------------
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