Allows the general configuration code to successfully compile with
implicit string conversions disabled.

This was initially added to prevent problems from stubbed/not implemented NFC services, but as we never encountered such and as it's only used in a deprecated function anyway, I guess we can just remove it to prevent more clutter of the settings.

* Adds a new Hotkeys tab in the Controls group.
* Double-click a Hotkey to rebind it.

Using the QtProfileSelectorDialog, this implementation is trivial. This mimics the real switch behavior of asking which user on every game boot, but it is default disabled as that might get inconvenient.

The service manager seems to be a nullptr before a game boots

Started implementation of the AM message queue mainly used in state getters. Added the ability to switch docked mode whilst in game without stopping emulation. Also removed some things which shouldn't be labelled as stubs as they're implemented correctly

Prevents unnecessary reloads on every configuration operation.

* Fixed conflict with nfp

* Few fixups for nfc

* Conflict 2

* Fixed AttachAvailabilityChangeEvent

* Conflict 3

* Fixed byte padding

* Refactored amiibo to not reside in "System"

* Removed remaining references of nfc from system

* used enum for Nfc GetStateOld

* Added missing newline

* Moved file operations to front end

* Conflict 4

* Amiibos now use structs and added mutexes

* Removed amiibo_path

Placing the array wholesale into the header places a copy of the whole
array into every translation unit that uses the data, which is wasteful.
Particularly given that this array is referenced from three different
translation units.

This also changes the array to contain pairs of const char*, rather than
QString instances. This way, the string data is able to be fixed into
the read-only segment of the program, as well as eliminate static
constructors/heap allocation immediately on program start.

Instead, we make a proper registry class and house it within the main
window, then pass it to whatever needs access to the loaded hotkeys.

This way, we avoid a global variable, and don't need to initialize a
std::map instance before the program can do anything.

Makes code consistent with our style of defaulting special member
functions where applicable.

configure_general.ui: Add UI Option for Themes

config.cpp: Save Theme Settings

This makes clang-format useful on those.

Also add a bunch of forgotten transitive includes, which otherwise
prevented compilation.