small adjustment suggestion

I think some setting in the N properties panel have a little adjustment will be much butter, like this, the "world Background" and "Ambient Occlusion" maybe move in to the world tab will be more better, and the "Depth of Field " move into Camera tab. So when you want setting just go to world tab or camera tab, don't need N properties Panel, and at the same time you can setting others value in the Properties Editor too. just the suggestion, Thanks!