When selecting a draw with a tessellation evaluation shader using
layout(quads), RenderDoc would emit an "Unexpected output topology"
error.
Additional changes:
* Fixes a typo in the VK_EXT_transform_feedback name in various debug
prints.
* Renames the "GS Out" 3D View tab in the Mesh Viewer to "GS/DS Out",
to match the corresponding table. This affects all APIs.