Ext.NET version: 4.5.0
Google Chrome version: 63.0.3239.84 (Official Build) (64-bit)
Operating System: Windows 10, Version 1709 (OS Build 16299.64)

Hello,

When using the Chrome's or Opera's zoom feature to zoom out on an Ext.NET page, the borders around TextField controls become invisible, so it's hard to see where you can enter text. This does not happen at all in Firefox (the borders are always at least 1px wide). Internet Explorer and Edge don't handle this perfectly, but they can at least show at least 3 of 4 borders.

This happens here for example: https://examples4.ext.net/#/Form/TextField/Buttons/

Here's Chrome on 100% zoom:
Click image for larger version.  Name: chrome-100.png  Views: 53  Size: 18.3 KB  ID: 25089

And on 90% zoom:
Click image for larger version.  Name: chrome-90.png  Views: 68  Size: 16.4 KB  ID: 25090

For comparison, this is Firefox on 90% zoom:
Click image for larger version.  Name: firefox-90.png  Views: 57  Size: 15.5 KB  ID: 25091

A simple 
<div style="width: 400px; height: 20px; border: 1px solid grey;"></div>
does not exhibit this issue either.

Best regards,
Raphael