[ALOY-1317] Alloy: Default top-level ID doesn't take if-attribute into account

<Alloy>
	
	<TabGroup if="Alloy.Globals.requiredVersion">
		<Require src="list" />
		<Require src="apis" />
		<Require src="console" />
	</TabGroup>

	<Window if="!Alloy.Globals.requiredVersion">
		<Label>This sample requires Titanium 5.1 or later</Label>
	</Window>

</Alloy>

    if (Alloy.Globals.requiredVersion) {
        var __alloyId11 = [];
        $.__views.__alloyId12 = Alloy.createController("list", {
            id: "__alloyId12"
        });
        __alloyId11.push($.__views.__alloyId12.getViewEx({
            recurse: true
        }));
        $.__views.__alloyId14 = Alloy.createController("apis", {
            id: "__alloyId14"
        });
        __alloyId11.push($.__views.__alloyId14.getViewEx({
            recurse: true
        }));
        $.__views.__alloyId16 = Alloy.createController("console", {
            id: "__alloyId16"
        });
        __alloyId11.push($.__views.__alloyId16.getViewEx({
            recurse: true
        }));
        $.__views.index = Ti.UI.createTabGroup({
            tabsBackgroundColor: "white",
            tabsTintColor: Alloy.CFG.brandPrimary,
            tabs: __alloyId11,
            id: "index"
        });
        $.__views.index && $.addTopLevelView($.__views.index);
    }
    if (!Alloy.Globals.requiredVersion) {
        $.__views.__alloyId17 = Ti.UI.createWindow({
            backgroundColor: "#fff",
            barColor: Alloy.CFG.brandPrimary,
            navTintColor: "#FFF",
            translucent: false,
            titleAttributes: {
                color: "#FFF"
            },
            id: "__alloyId17"
        });
        $.__views.__alloyId17 && $.addTopLevelView($.__views.__alloyId17);
        $.__views.__alloyId18 = Ti.UI.createLabel({
            text: "This sample requires Titanium 5.1 or later",
            id: "__alloyId18"
        });
        $.__views.__alloyId17.add($.__views.__alloyId18);
    }