[ExtJS 5.1.4] Ext.window.Window is rendering beyound View

[Maximus2015]

Ext version tested: 5.1.4.338

Browser versions tested against: Chrome 61.0.3163.100, FF 55.0.2

Description:
Hello, Sencha Support. I have problem with Ext.window.Window component, rendering beyound view in app.
Is there any ways to fix it without upgrade to ExtJS 6?

Steps to reproduce problem:

• Go to Sencha fiddle: https://fiddle.sencha.com/#view/editor&fiddle/27od
• Click Run
• In right panel press "Edit" button

The result that was expected: Window is rendered in center of view

Steps that occurs instead: Window rendered at bottom, beyound view

[mhenn]

Very annoying bug. We were able to reproduce it in

• Chrome 61
• IE 10.0.9200.17148 (Win 7)
• IE 10.0.9200.17609
• IE 11.0.9600.18816 (Win 7/8)
• IE 11.674.15063.0 (Win 10)

We couldn't reproduce it in

• Firefox
• Edge 40.15063.674.0 (Win 10)

Here is a minimalistic Fiddle to reproduce:
https://fiddle.sencha.com/#view/editor&fiddle/2892


Edit:
Fred Moseley from Sencha Support added a css fix to the index.html, which seems to work quite well:

<style>
    .x-viewport {
        width: 100%;
        height: 100%;
    }
    .x-viewport > .x-body {
        position: fixed;
        top: 0;
        left: 0;
        min-width: 100%;
        min-height: 100%;
    }
</style>

[Maximus2015]

Thank you very much!