Saves the content of the shortcut object into the file named
file
.
If
file
is omitted, the filename is taken from the
File
property
of the object (which, if not changed, is the name of the last
Load
ed
file).
If no file was loaded and the
File
property doesn't contain a
valid filename,
the method returns
undef
, which is also returned on error.
A true value is returned if everything was successful.