We want to save the graphic with a specific name, usually this is
when we want to use the same name that was used when reading the
image from the document.

Change-Id: I7419f0593dea333a60ce513190211e0409480e66
Reviewed-on: https://gerrit.libreoffice.org/49553Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>
Tested-by: Tomaž Vajngerl <quikee@gmail.com>