This commit add a minimal support for editing chart embedded in a
spreadsheet or a text document or a presentation.
Graphic object can be moved and resized, text object can be edited.

Change-Id: I8e637dabf328a94bd6bb0e309a245302cff421d8
Reviewed-on: https://gerrit.libreoffice.org/40681Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Miklos Vajna <vmiklos@collabora.co.uk>