Debugger: Better handling of the tabbed extra views

Closing with the [x] now resets the Display mode of the associated
iname, and the view hides if there are no visible tabs left.
Also, remove the long-unused DisplayProcess format.

Change-Id: Ibd3308549af75e345c672c07f6714d26e7196e5a
Reviewed-by: Christian Stenger <christian.stenger@digia.com>

src/plugins/debugger/watchhandler.h

@@ -36,11 +36,11 @@
 #include <QPointer>
 #include <QVector>
 
-QT_FORWARD_DECLARE_CLASS(QTabWidget)
-
 namespace Debugger {
 namespace Internal {
 
+class SeparatedView;
+
 // Special formats. Keep in sync with dumper.py.
 enum DisplayFormat
 {
@@ -190,9 +190,6 @@ public:
     void resetValueCache();
 
 private:
-    void removeSeparateWidget(QObject *o);
-    void showSeparateWidget(QWidget *w);
-
     friend class WatchModel;
 
     void saveWatchers();
@@ -203,7 +200,7 @@ private:
 
     WatchModel *m_model; // Owned.
     DebuggerEngine *m_engine; // Not owned.
-    QPointer<QTabWidget> m_separateWindow; // Owned.
+    SeparatedView *m_separatedView; // Owned.
 
     int m_watcherCounter;