Flattened images for printing

....handbook.feature/latex/img-print/icons/rodin/next_pd.png

...dbook.feature/latex/img-print/icons/rodin/next_prover.png

....handbook.feature/latex/img-print/icons/rodin/next_rv.png

...dinp.handbook.feature/latex/img-print/icons/rodin/npp.png

...andbook.feature/latex/img-print/icons/rodin/npplassoo.png

...inp.handbook.feature/latex/img-print/icons/rodin/nppr.png

...inp.handbook.feature/latex/img-print/icons/rodin/null.png

...odinp.handbook.feature/latex/img-print/icons/rodin/p0.png

...odinp.handbook.feature/latex/img-print/icons/rodin/p1.png

...np.handbook.feature/latex/img-print/icons/rodin/paste.png

....handbook.feature/latex/img-print/icons/rodin/pending.png

...ok.feature/latex/img-print/icons/rodin/pending_broken.png

...dbook.feature/latex/img-print/icons/rodin/pending_ovr.png

...book.feature/latex/img-print/icons/rodin/pending_pale.png

...andbook.feature/latex/img-print/icons/rodin/pn_prover.png

...odinp.handbook.feature/latex/img-print/icons/rodin/pp.png

...dbook.feature/latex/img-print/icons/rodin/prev_prover.png

...handbook.feature/latex/img-print/icons/rodin/prf_tree.png

....handbook.feature/latex/img-print/icons/rodin/prj_obj.png

...ook.feature/latex/img-print/icons/rodin/problems_view.png