Hi, there is a problem with filter filter popups in Data Grid.

Steps to reproduce:

1. Go to https://www.telerik.com/kendo-react-ui/components/grid/filtering

2. Open the date filter popup  in the "FirstOrderOn" Column and click on any date

3. Open and close the filter combo in "Disconinued" column couple of times. 

Actual Behavior
On version 9.1.0 besides Opening the "Disconinued" filter combo, the date popup also openes. On version 8.5.0 seems to work fine

Expected Behavior
Only the popup from "Discontinued" column should be Opened / Closed

Add the ability to apply table breakpoints to the Grid for responsive behavior.

Similar to the Bootstrap tables:

https://getbootstrap.com/docs/4.4/content/tables/#breakpoint-specific

Hello, 
I am looking to start using the Kendo React grid control, but I need the grid to be responsive to support viewing on a phone. I noticed that your Angular grid has this functionality, but it is missing from your React grid. 
I would like to have rows turn into individual cards when viewed on a phone. The closest thing I see in the react documentation involves hiding columns, which is undesirable.  Is there a way to add this behavior to the React grid?  If not, when will that be implemented?  
Thank you, 
Alex