Reduce includes

src/settings/appearancesettingspage.cpp

@@ -32,13 +32,16 @@
 #include <QPushButton>
 #include <QRadioButton>
 #include <QSlider>
+#include <QBoxLayout>
+#include <QCheckBox>
+#include <QComboBox>
+#include <QSpinBox>
 #include <QSettings>
 
 #include "appearancesettingspage.h"
 #include "core/appearance.h"
 #include "core/iconloader.h"
 #include "core/stylehelper.h"
-#include "playlist/playlistview.h"
 #include "covermanager/albumcoverchoicecontroller.h"
 #include "settingspage.h"
 #include "settingsdialog.h"