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/hotkeys.cpp

@@ -2,13 +2,11 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
+#include "citra_qt/hotkeys.h"
 #include <map>
-
 #include <QKeySequence>
 #include <QShortcut>
 #include <QtGlobal>
-
-#include "citra_qt/hotkeys.h"
 #include "citra_qt/ui_settings.h"
 
 struct Hotkey {