[TIMOB-23275] Windows: Deprecate Ti.UI.View.enabled, rename to touchEnabled

While reviewing a windows ticket, implementing the enabled property for view elements, it was found that it was not implemented for iOS. This should be fixed to achieve parity between android & windows. *TEST CODE:*

var win = Ti.UI.createWindow({});

var view1 = Ti.UI.createView({
    backgroundColor: "Magenta",
    enabled: true,
    left: 0,
    top: 50,
    height: 100,
    width: 100
});

view1.addEventListener('click', function() {
    alert("CLICKED! 1");
});

var view2 = Ti.UI.createView({
    backgroundColor: "green",
    enabled: false,
    top: 50,
    left: 200,
    height: 100,
    width: 100
});

view2.addEventListener('click', function() {
    alert("CLICKED! 2");
});

win.add(view1);
win.add(view2);
win.open()

Steps to Reproduce

1. Create a default classic mobile project. 2. Apply test code above to app.js file. 3. Deploy app to iOS simulator / device. 4. After launching the app, click / tap on left view. 5. Click / tap on right view.

Actual Result

Left view *enabled* property is set to true : Alert appears when clicked. Right view *enabled* property is set to false : Alert appears when clicked.

Expected Result.

Left view *enabled* property is set to true : Alert *should* appear when clicked. Right view *enabled* property is set to false : Alert *should NOT* appear when clicked.