When using Grid custom editor, the Kendo Editable adds data-binding for the value for both the hidden and the visible inputs of the ComboBox. This results in a field named [propertyName]_input to appear in the item model after it has been edited.

The way this happens is a bit inconsistent and depends on setup, but in the linked dojo, using tab after editing causes this to happen, but in our applications pressing enter  and sometimes even clicking off the editor causes this issue. 

Reproduction of the problem

• Go to the following Dojo sample; https://dojo.telerik.com/OfiCoyog
• Edit the category column and wait for the combobox.
• Type free text, without selecting a value;
• Press tab - the value won't be updated. Also, if you look at the Item, it will have a Category_input field, that has been added, while editing;

See here for the original bug. https://github.com/telerik/kendo-ui-core/issues/3427#issue-244359311

CSP is a great security feature. It should be fully supported by Kendo! The best would be some way to precompile Kendo Templates. Second option could be that you can use Kendo + CSP when not using own Kendo Templates at all. 

### Bug report

When the Kendo UI NumericTextBox has the factor property set and a value pasted, a wrong number is output.

### Reproduction of the problem

1. Create a NumericTextBox and set the format and factor properties.

2. Set a value. Copy and paste value greater than 1.

3. The value 100 is applied to the widget.

Dojo sample for reproduction:

https://dojo.telerik.com/ufOSEGEn

### Expected/desired behavior

The pasted value should be applied to the widget.

### Environment

* **Kendo UI version:** 2021.1.224
* **jQuery version:** 1.12.4
* **Browser:** [all]

Bug report

Currently, when an item is expanded in the Menu, the screen readers do not read which item/subitem is expanded. The 'aria-expanded' attribute is not added to the Menu.

https://www.w3.org/TR/wai-aria-practices/examples/menubar/menubar-1/menubar-1.html

Reproduction of the problem

1. Open the demos
2. Focus on the Menu and expand an item.

Current behavior

The 'aria-expanded' is not added to the Menu and the screen readers do not inform which item is expanded

Expected/desired behavior

The screen readers should be able to read which item is expanded in the Menu.

Environment

• Kendo UI version: 2021.1.119
• Browser: [all ]

Bug report

For a TabStrip in a PanelBar, the content for all tabs is displayed initially. You need to select all the tabs so that the content would start displaying correctly for the corresponding tab.

Reproduction of the problem

1. Open this Dojo - https://dojo.telerik.com/@martin.tabakov@progress.com/IxUxAfOT/5

Current behavior

The content for all the tabs is displayed.

Expected/desired behavior

The content should be displayed separately for each tab.

Environment

• Kendo UI version: 2021.3.1207
• Browser: [all]