on-new-image-snip in editor<%>

Creates and returns a new instance of image-snip% for insert-image.

• (send an-editor on-new-image-snip filename kind relative-path? inline?) -> image-snip% object
     filename : string or #f
   kind : symbol in '(unknown gif jpeg xbm xpm bmp pict)
   relative-path? : boolean
     inline? : boolean

  Returns (make-object image-snip% filename kind relative-path? inline?).