MicFileResourceReference >> fromFileRef: answers invalid Windows full name

[Driolar]

Doing something like

(MicFileResourceReference fromFileRef: 
'C:/cygwin64/home/driolar/Booklet-PharoGraphs-master/Chapters/Chapter1/figures/Paris_Metro_map_1024.pdf' asFileReference) fullName 

leads to

>>> '/C:/cygwin64/home/driolar/Booklet-PharoGraphs-master/Chapters/Chapter1/figures/Paris_Metro_map_1024.pdf'.

Note the leading slash before the drive letter that makes the path invalid on Windows.
As a consequence, TeX cannot find the figures when building a PDF on Windows.

The leading slash is set in:

MicAbsoluteResourceReference >> path
	"return the path part of my uri"
	^ '/', uri path