Pica/citra-qt: Replace command list view and command list debugging code with something more sophisticated.

Note: There is a pre-existing issue with booting a new game in that it keeps the old EmuThread.
The GL code now supports this but the Core still doesn't.

Connect the emu_thread start/finish to a moveContext slot.

These avoid relying on memset for clearing the arrays.

Changed HLE function return methods to be static inline functions.

Returning a copy of the string is what was likely meant to be done.

Most functions already operate on std::strings. This also removes the need to manually null terminate thread names.

entry_point would not be added to the string. Also used StringFromFormat
so that the buffer is unnecessary.

On POSIX systems mmap will return MAP_FAILED ((void*)-1) instead of a null pointer.

Also replaced C headers with the C++ equivalent ones

Fixes building with clang.

HID: Fix typo with DisableGyroscopeLow command.