maxwell_3d: Fix stencil back mask

Remove option "Show files with type 'Unknown'"

hle: services: Use std::shared_ptr instead of copy by value.
- This is a prerequisite to adding a mutex to `ServiceFramework`, which cannot be copied.
- This will be used for threaded services.

gpu_thread: Use MPSCQueue for GPU commands.

video_core: memory_manager: Use GPU interface for cache functions.

- Necessary for multiple service threads.

maxwell_to_gl: Implement R8G8_USCALED

shader/shift: Implement SHF

hle: services: Fix prepo IPC, and add better error checking.

gl_rasterizer: Fix instanced draw arrays

applets: Fixes for software keyboard and transfer memory.

- This was holdover from citra.

vk_rasterizer: Use noexcept methods of std::bitset

Removes bounds checking from "texceptions" instances.

shader/bfi: Implement register-constant buffer variant

shader/arithmetic: Implement FCMP

GUI: Togglable graphics settings buttons in status bar

yuzu: Implement Vulkan frontend

input_common/udp: Minor changes

Previously the UDP backend would never actually get shut down.

Prevents trivial warnings and ensures interfaces are properly
maintained between the base class.

std::function is allowed to heap allocate if the size of the captures
associated with each lambda exceed a certain threshold. This prevents
potentially unnecessary reallocations from occurring.

Gets rid of a trivially avoidable atomic reference count increment and
decrement.