Bug report
When using Spreadsheet with SASS theme and entering an array formula with Ctrl+Shift+Enter the {} braces surrounding array formula in the formula bar are not displayed.

Reproduction of the problem
Enter the following formula in any cell within the dojos below cell and press Ctrl+Shift+Enter : =Product(C3:C11)
dojo of a Spreadsheet demo with LESS theme
dojo of a Spreadsheet demo with SASS theme

Current behavior
Spreadsheet with LESS based theme displays the array formula correctly in the formula bar: {=Product(C3:C11)}
Spreadsheet with SASS based theme displays the array formula incorrectly in the formula bar: =Product(C3:C11)

Expected/desired behavior
Spreadsheet with SASS based theme should display array formulas with {} braces: {=Product(C3:C11)}

Environment
Kendo UI version: 2019.3.1023