STYLE: prefer emplace_back() to append() + last()

...utilities/mesh/advanced/refinementLevel/refinementLevel.C

...ons/utilities/mesh/manipulation/createPatch/createPatch.C

...namicMesh/polyTopoChange/polyTopoChange/hexRef8/hexRef8.C

src/fileFormats/gltf/foamGltfList.C

...CollidingParcel/CollisionRecordList/CollisionRecordList.C

src/sampling/sampledSet/sampledSet/sampledSet.H

src/sampling/sampledSurface/sampledSurface/sampledSurface.H

src/sampling/surface/isoSurface/isoSurfaceTopo.C