feat(ios): support iOS 26+ source views for non-iPad devices

[hansemannn]

This pull request adds support for using the source view ("view") parameter outside of the iPad as well. It also removes the manual "rect" handling, as modern iOS versions are able to infer the rect from the source view directly. That also makes the code more lightweight by removing manual positioning code.

This way, the option dialogs be shown as nicely presented popovers on iOS 26+:

const win = Ti.UI.createWindow({
    backgroundColor: '#fff'
});

const btn = Ti.UI.createButton({
    title: 'Show options'
});

btn.addEventListener('click', () => {
    const dialog = Ti.UI.createOptionDialog({
        title: 'Delete item',
        message: 'Do you want to delete this item?',
        options: ['Delete', 'Rename', 'Cancel'],
        cancel: 2,
        destructive: 1
    });
    
    // optional: shows as popover on iOS 26+
    dialog.show({ view: btn });
});

win.add(btn);
win.open();

iOS 18.5	iOS 26 (without view)	iOS 26 (with view)

[designbymind]

Just wanted to drop a quick note to say that this is working great on my end, haven't had any issues. The contextual OptionDialog experience is so much more intuitive, excellent addition!