Resolves: #i15508# keep the original file and format AFAP...

when breaking links to graphic contents in Writer

(cherry picked from commit a9325263271883fb147351d287c817ea7984fbe9)

Conflicts:
	sw/source/core/graphic/ndgrf.cxx

Change-Id: I86e2b80b95f4e26a734f56d060f97e6430ae56b8