No 'relatedTarget' in 'blur' event in IE

[ragzovskii]

Ext version tested:

• Ext 5.0.1
• Ext 4.2.2

Browser versions tested against:

• IE9
• IE11(edge)
• Chrome 38.0.21.25

Description:

• Blur event should have related target, but it doesn't

Steps to reproduce the problem:

• open console
• double click any name to open editor
• click outside of editor to blur it
• check console and see there's no related target for IE and there is related target for Chrome

[evant]

IE doesn't provide the relatedTarget, it's reproducible without Ext:

document.addEventListener("DOMContentLoaded", function() {
    var input1 = document.createElement('input');
    input1.type = 'text';
    input1.id = 'foo';
    input1.addEventListener('blur', function(e) {
        console.log(e.relatedTarget ? e.relatedTarget.id : 'input1#notarget');
    });
    document.body.appendChild(input1);

    var input2 = document.createElement('input');
    input2.type = 'text';
    input2.id = 'bar';
    input2.addEventListener('blur', function(e) {
        console.log(e.relatedTarget ? e.relatedTarget.id : 'input2#notarget');
    });
    document.body.appendChild(input2);
});