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

Change-Id: I8e637dabf328a94bd6bb0e309a245302cff421d8
Reviewed-on: https://gerrit.libreoffice.org/39342Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Marco Cecchetti <mrcekets@gmail.com>