Remove empty newlines in #include blocks.

This makes clang-format useful on those.

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

src/citra_qt/ui_settings.h

@@ -4,12 +4,11 @@
 
 #pragma once
 
+#include <vector>
 #include <QByteArray>
 #include <QString>
 #include <QStringList>
 
-#include <vector>
-
 namespace UISettings {
 
 using ContextualShortcut = std::pair<QString, int>;