Added more Icons: 1259
Added more Icons: 1259

- Added appbar_3d_3ds
- Added appbar_3d_collada
- Added appbar_3d_obj

batzen/MahApps.Metro,Evangelink/MahApps.Metro,Danghor/MahApps.Metro,pfattisc/MahApps.Metro,chuuddo/MahApps.Metro,xxMUROxx/MahApps.Metro,MahApps/MahApps.Metro,ye4241/MahApps.Metro,Jack109/MahApps.Metro,psinl/MahApps.Metro,jumulr/MahApps.Metro,p76984275/MahApps.Metro