sign: Open StreamStats as a Tabbed widget

PortStats and StreamStats Windows are presented as a tabbed widget.
Multiple StreamStats windows are titled to include an id to hint at the
sequence in which they were opened

client/portstatswindow.cpp

@@ -234,14 +234,18 @@ void PortStatsWindow::on_tbGetStreamStats_clicked()
     model->portListFromIndex(selectedColumns(), portList);
 
     if (portList.size()) {
-        QDockWidget *dock = new QDockWidget(tr("Stream Statistics"),
-                                                mainWindow);
+        QDockWidget *dock = new QDockWidget(mainWindow);
         streamStatsModel = new StreamStatsModel(dock);
         dock->setWidget(new StreamStatsWindow(streamStatsModel, dock));
+        dock->setWindowTitle(dock->widget()->windowTitle());
         dock->setObjectName("streamStatsDock");
-        dock->setFloating(true);
         dock->setAttribute(Qt::WA_DeleteOnClose);
+        QDockWidget *statsDock = mainWindow->findChild<QDockWidget*>(
+                                                            "statsDock");
         mainWindow->addDockWidget(Qt::BottomDockWidgetArea, dock);
+        mainWindow->tabifyDockWidget(statsDock, dock);
+        dock->show();
+        dock->raise();
     }
 
     // Get stream stats for selected ports, portgroup by portgroup

client/streamstatswindow.cpp

@@ -22,14 +22,29 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>
 #include <QAbstractItemModel>
 #include <QHeaderView>
 
+static int id;
+static int count;
+
 StreamStatsWindow::StreamStatsWindow(QAbstractItemModel *model, QWidget *parent)
     : QWidget(parent)
 {
     setupUi(this);
 
+    if (id)
+        setWindowTitle(windowTitle() + QString("(%1)").arg(id));
+    id++;
+    count++;
+
     streamStats->setModel(model);
 
     streamStats->verticalHeader()->setHighlightSections(false);
     streamStats->verticalHeader()->setDefaultSectionSize(
             streamStats->verticalHeader()->minimumSectionSize());
 }
+
+StreamStatsWindow::~StreamStatsWindow()
+{
+    count--;
+    if (count == 0)
+        id = 0;
+}

client/streamstatswindow.h

@@ -29,6 +29,7 @@ class StreamStatsWindow: public QWidget, private Ui::StreamStatsWindow
     Q_OBJECT
 public:
     StreamStatsWindow(QAbstractItemModel *model, QWidget *parent = 0);
+    ~StreamStatsWindow();
 };
 
 #endif

client/streamstatswindow.ui

@@ -10,7 +10,7 @@
    </rect>
   </property>
   <property name="windowTitle" >
-   <string>Form</string>
+   <string>Stream Statistics</string>
   </property>
   <layout class="QHBoxLayout" >
    <item>