Bug Description

An unreadable and unprintable symbol †renders in dropdownlists in the classic-silver theme when it is loaded from unpkg - https://unpkg.com/@progress/kendo-theme-classic@12.0.0/dist/classic-silver.css

When the classic-silver.css theme is opened in Notepad++, the k-list-optionlabel::before selector applies content: "ZWSP", which appears to be problematic.

Steps to Reproduce

Steps to reproduce the behavior:

1. Go to this Dojo example - https://runner.telerik.io/fullscreen/SHuPXBQI/3
2. Open the DropDownList

Expected Behavior

No unreadable symbols should be present in the DropDown's items

Actual Behavior

There's an unreadable symbol †at the start of the DropDownList's items

Affected Theme(s)

• All themes

Affected Suites

• Kendo UI for jQuery

Browser Information

• All browsers