Calendar - $kendo-calendar-cell SASS-variable is not considered.

[zhpenkov]

Describe the bug

Reported in ticket: 1639003

The problem comes from:

• lack of border-style: solid to the Calendar's Cells

• $kendo-calendar-cell-border: null !default; variable, which is defined in the variable.scss file but never used.

• $kendo-calendar-cell-selected-border: $kendo-selected-border !default;, $kendo-calendar-cell-selected-hover-border: $kendo-selected-hover-border !default; , which apply border-color, which does not appear due to the lack of border-style: solid

With further investigation, it appears that there is no style rule for setting border-style to Calendar cells.

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots
If applicable, add screenshots to help explain your problem.

Affected package (please remove the unneeded items)

• theme-default
• theme-bootstrap
• theme-material
• theme-classic
• theme-fluent

Affected suites (please remove the unneeded items)

• Kendo UI for jQuery
• Kendo UI for Angular
• Kendo UI for React
• Kendo UI for Vue
• Telerik UI for Blazor

Affected browsers (please remove the unneeded items)

• Not Applicable

Build system information (please remove the unneeded items)

• Not Applicable

Additional context
Add any other context about the bug.