Callback of tab item activate when close parent window.

[Rincelent]

Code sample to reproduce issue (just click on close button)

var pos = photonui.Helpers.getAbsolutePosition("demo");
var tabs = new photonui.TabLayout({
    tabsPosition: "top",  // "top", "bottom", "left" or "right"
    children: [
        new photonui.TabItem({
            title: "Tab 1",
            child: new photonui.Label("Widget inside the first tab"),
                    callbacks: {
                        show: function(tab) {
                            console.log(tab.visible)
                        }
                    },
        }),
        new photonui.TabItem({
            title: "Tab 2",
            child: new photonui.Button(),
                    callbacks: {
                        show: function(tab) {
                            console.log(tab.visible)
                        }
                    },
        }),
        new photonui.TabItem({
            title: "Tab 3",
                    callbacks: {
                        show: function(tab) {
                            console.log(tab.visible)
                        }
                    },
        })
    ]
});

new photonui.Window({
    title: "My Window",
    visible: true,
   child: tabs,
    x: pos.x, y: pos.y,
    width: 300, height: 100,
    callbacks: {
        "close-button-clicked": function(widget) {
            widget.destroy();
        },
        "position-changed": function(widget, x, y) {
            widget.title = "My Window (x: " + x + ", y: " + y + ")";
        }
    }
});