Merge branch 'master' into stencilMask

* master: (108 commits)
  Fix bkaradzic#2071 again
  entry_osx: setMouseLock implementation
  Renamed vertexdecl.* to vertexlayout.*
  Updated spirv-cross.
  Updated spirv-tools.
  Updated glslang.
  Updated ImGui.
  setMouseLock windows fix for  _lock = false case
  Fix bkaradzic#2071, bkaradzic#1950
  Vulkan: fall back to deprecated validation layers if necessary
  Vulkan: bind correct compute index buffer
  Formatting
  Vulkan: enable sRGB backbuffer and sRGB textures
  Vulkan: fix validation errors, switch to new validation layers
  Cleanup.
  Revert "Allow macro expansion for sampler registers with HLSL 4 and below"
  Fixed issue bkaradzic#2072.
  Allow macro expansion for sampler registers with HLSL 4 and below
  Cleanup.
  Vulkan: use correct vertex layout for calculating vertex count
  ...