Adds a new view tab to this panel.
        
        :param      view    | <XView>
                    title   | <str>
        
        :return     <bool> | success

def addTab(self, view, title):
        """
        Adds a new view tab to this panel.
        
        :param      view    | <XView>
                    title   | <str>
        
        :return     <bool> | success
        """
        if not isinstance(view, XView):
            return False

        tab = self._tabBar.addTab(title)
        self.addWidget(view)
        tab.titleChanged.connect(view.setWindowTitle)
        
        # create connections
        try:
            view.windowTitleChanged.connect(self.refreshTitles,
                                            QtCore.Qt.UniqueConnection)
            view.sizeConstraintChanged.connect(self.adjustSizeConstraint,
                                            QtCore.Qt.UniqueConnection)
            view.poppedOut.connect(self.disconnectView,
                                   QtCore.Qt.UniqueConnection)
        except RuntimeError:
            pass
        
        self.setCurrentIndex(self.count() - 1)
        
        return True