Deprecate Mac Native Buttons

.. they were removed from code recently but still
   lingered harmlessly in the codebase.

.. now moving into the deprecated folder to stop
   them from being used again in the future.

src/Charts/ChartBar.cpp

@@ -21,7 +21,6 @@
 #include "DiaryWindow.h"
 #include "DiarySidebar.h"
 #include "Context.h"
-#include "QtMacButton.h"
 
 #include <QFontMetrics>
 

src/Charts/GcOverlayWidget.cpp

@@ -25,7 +25,6 @@
 #include "DiaryWindow.h"
 #include "DiarySidebar.h"
 #include "Context.h"
-#include "QtMacButton.h"
 
 GcOverlayWidget::GcOverlayWidget(Context *context, QWidget *parent) : QWidget(parent), context(context)
 {

src/Charts/GcOverlayWidget.h

@@ -35,11 +35,6 @@
 
 
 class Context;
-#ifdef Q_OS_MAC
-class QtMacButton;
-#else
-class GcScopeButton;
-#endif
 class GcLabel;
 
 class GcOverlayWidgetItem

src/Charts/HomeWindow.h

@@ -38,10 +38,6 @@
 #include "Context.h"
 #include "RideItem.h"
 
-#ifdef Q_OS_MAC
-#include "QtMacSegmentedButton.h"
-#endif
-
 class ChartBar;
 class LTMSettings;
 

src/Gui/GcScopeBar.cpp

@@ -20,7 +20,6 @@
 #include "DiaryWindow.h"
 #include "DiarySidebar.h"
 #include "Context.h"
-#include "QtMacButton.h"
 #include "HelpWhatsThis.h"
 
 GcScopeBar::GcScopeBar(Context *context) : QWidget(context->mainWindow), context(context)