Pica/CommandProcessor: Fix vertex decoding if multiple memory areas are accessed for different attributes.

This effectively adds support for a lot texture formats in the rasterizer.

This was caused by the framebuffer display widget not checking whether we are actually in a valid emulation state or not.

This is useful when doing crazy stuff like inheriting from BitField.

Clean up some warnings

Add a clone of std::make_unique and revert C++14 requirement

SaveData: Added some documentation to FormatSaveData

Properly erase/remove a DebuggerObserver

armemu: Narrow the scope of some variables in handle_v6_insn

armemu: Get rid of bitwise parenthesis warnings

GSP_GPU: Shut up FlushDataCache

SystemSaveData: Fixed a typo that was segfaulting

armemu: Set GE flags properly for SSUB16, SADD16, SSAX, and SASX.

armemu: Fix USAT16.

SaveData: Implemented the SystemSaveData archive.

Maybe sometime when we actually implement that

We still don't know what the other parameters do, but they appear to be very similar to those of FormatThisUserSaveData.
Most likely FormatThisUserSaveData is just an alias for FormatSaveData with LowPathType Empty

Combine SSUB16, SADD16, SASX, and SSAX.