Move internal settings headers into /internal/ dir

The additional headers are not intended to be public. To reinforce that
it is a bad idea to include these they are put into the /internal/
directory.

build_scripts/qt/sources.pri

@@ -52,10 +52,10 @@ HEADERS += src/overlaycontroller.h \
     src/keyboard_input/input_parser.h \
     src/keyboard_input/input_sender.h \
     src/settings/settings.h \
-    src/settings/setting_value.h \
-    src/settings/settings_internal.h \
-    src/settings/settings_controller.h \
-    src/settings/specific_setting_value.h
+    src/settings/internal/setting_value.h \
+    src/settings/internal/settings_internal.h \
+    src/settings/internal/settings_controller.h \
+    src/settings/internal/specific_setting_value.h
 
 win32 {
     SOURCES += src/tabcontrollers/audiomanager/AudioManagerWindows.cpp \

src/settings/internal/settings_controller.h

@@ -3,9 +3,9 @@
 #include <array>
 #include <vector>
 #include <easylogging++.h>
-#include "settings.h"
+#include "../settings.h"
 #include "setting_value.h"
-#include "../utils/setup.h"
+#include "../../utils/setup.h"
 #include "specific_setting_value.h"
 
 namespace settings

src/settings/internal/settings_internal.h

@@ -2,7 +2,7 @@
 #include <QSettings>
 #include <string>
 #include <type_traits>
-#include "../overlaycontroller.h"
+#include "../../overlaycontroller.h"
 
 namespace settings
 {

src/settings/internal/specific_setting_value.h

@@ -1,7 +1,7 @@
 #pragma once
 #include <type_traits>
 #include "setting_value.h"
-#include "settings.h"
+#include "../settings.h"
 
 namespace settings
 {

src/settings/settings.cpp

@@ -2,7 +2,7 @@
 #include <QSettings>
 #include <easylogging++.h>
 #include "../overlaycontroller.h"
-#include "settings_controller.h"
+#include "internal/settings_controller.h"
 
 namespace settings
 {