Modifying R_Addition_Multiple bond dictionary

The One_De nodes specified R as the other group which
means it could be another delocalized group. This caused
RMG not to descend down to correct node.

Example case is Fulvene + H would hit Cds-HH_Cds-OneDe , HJ
instead of Cds-HH_Cds-CdCd , HJ.
Minor adjustment of tree to correct the tabs between the levels