Here are the initial tabs for the 3D View Object Mode toolbar. This is based on the discussions between myself and @William Reynish (billrey) in T37569

Note: this does not add any new tools, merely assigns the tabs so that we can begin the organization.

P.S. apologies for the duplicate. The first one I mistakenly sent to the Edit Mode task, T37568. I have corrected it and also made a couple changes, per @Campbell Barton (campbellbarton)'s request.