Describe the bug
With LESS themes on iOS devices when the user taps and holds an icon in the Grid the following system popup appears

With the SASS themes the popup is not displayed.

To reproduce

1. Open the Dojo on an iOS device - https://dojo.telerik.com/@NeliK/oSODAvAz
2. Tap and hold one of the images

Expected behavior
The popup for saving/copying the image should be displayed.
The same example using LESS themes - https://dojo.telerik.com/IsOvIjef

The issue might be due to the usage of -webkit-touch-callout

Workaround

<style>
      .k-grid{
        -webkit-touch-callout: unset !important;
      }
    </style>

Affected package

• theme-default
• theme-bootstrap
• theme-material
• theme-tasks

Affected suites

• Kendo UI for jQuery

Affected browsers

• All

Build system information

• OS: [iOS]