Calc had the same problem as Writer: metadata is part of the doc shell,
but the clipboard document has no doc shell. So need to store this info
in ScDocument in some way in the clipboard case.

10:45 <@moggi> vmiklos: I would most likely add a ScClipOptions similar to ScDocOptions and only populate it in the clip document

Change-Id: I4ad01faa55cfb6fb58213d67003c8c0f9849800d