Filter expressions are inverted when reopening the column filter menu #8305
Description
Bug report
When filtering a specified Grid column, the filter expressions are inverted when the value of the first expression is empty/null.
Reproduction of the problem
- Filter a Grid column by leaving the first filter value empty:
- Filter the Grid and open again the filter menu. The filter expressions are inverted:
A Dojo sample for reproduction: https://dojo.telerik.com/CXChcTJT
Expected/desired behavior
The filter menu expressions must remain the same.
Environment
- **Kendo UI version: 2025.2.702
- **jQuery version: 3.7.0
- **Browser: [all]