Add queue system with background downloading and much more (#73)

* Do not build here until it is merged.

* WIP: Queue System.

Right now crashes randomly for whatever reason..

* Animate queue spinner more slowly

* Use LightLocks to prevent crashing in the queue

(I hope it's fixed at least)

* Build nightlies in queue-system

* Use version.h for version and specify 7 digits

* Remove unneeded $(CURDIR)

I put that these for testing, but it's not needed

* Multiple Changes, see desc for more.

1.) Theme Implementation.
2.) Show Battery + Time.
3.) Some more work on Queue-System (might still be broke).
4.) Update Copyright to 2021.
5.) Add `%FIRM%` to regex.
6.) Mass Add to Queue.
7.) Search with AND / OR filter.

* Gaaah, not again...

* Remove DoNothing, some LightLock changes, etc

aka
Further improvements to overall system stability and other minor adjustments have been made to enhance the user experience.

* See desc for more.

- Current Queue Entry can now be canceled.

- Fix installed list.

- Display Download Speed.

- BYE BYE Queue LightLock!

* Various adjustments to the queue menu

- Make cancel button slightly smaller
- Right align "Steps: ..." text
- Remove "Current Operation:" text
- Change KB/MB/GB to KiB/MiB/GiB
- Lots of little positioning tweaks
- Fix bug where you could get stuck in the prompt
- Make spinny thing have a ! when action is needed
- Make extracting file increment at the start instead of the end
- Delete dumb VS Code file and gitignore it

* Change to hollow full charge plugged in icon

* Fix the settings positions a bit

* Fix custom font download not having prompt

Also tweak the text positions, I forgot to change them

Co-authored-by: StackZ <47382115+SuperSaiyajinStackZ@users.noreply.github.com>

source/main.cpp

@@ -1,6 +1,6 @@
 /*
 *   This file is part of Universal-Updater
-*   Copyright (C) 2019-2020 Universal-Team
+*   Copyright (C) 2019-2021 Universal-Team
 *
 *   This program is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
@@ -33,9 +33,7 @@
 #define ARG_AMOUNT 4 // In case for more args, change this. It must be ARG amount + 1, because of 3DSX Path.
 std::string _3dsxPath = "";
 
-/*
-	ARG Init.
-*/
+/* ARG Init. */
 static void InitForARG() {
 	gfxInitDefault();
 	romfsInit();
@@ -51,14 +49,14 @@ static void InitForARG() {
 	mkdir("sdmc:/3ds/Universal-Updater/shortcuts", 0777);
 
 	config = std::make_unique<Config>();
+	GFX::SelectedTheme = config->theme();
+	if (GFX::SelectedTheme > (_THEME_AMOUNT - 1)) GFX::SelectedTheme = 0; // In case it is above the max themes.
 	Lang::load(config->language());
 	Init::LoadFont();
 	osSetSpeedupEnable(true); // Enable speed-up for New 3DS users.
 }
 
-/*
-	ARG Exit.
-*/
+/* ARG Exit. */
 static Result ExitForARG() {
 	Gui::exit();
 	Init::UnloadFont();