toODataString throw exception on text filter changed from is null to contains. 

https://stackblitz.com/edit/react-ertg4z?file=app%2Fmain.jsx 

Repro step:

1. Choose filter by Name which is using text filter.

2. Change filter from Is null to contains.

3. toODataString threw exception.

Click icon to close as well as open

The Tooltip component has a className property. Providing a class name there does not seem to apply the class to the DOM element. See my below code and attached screenshot ...

            <div className="col">
              <label className="d-block">Name</label>
              <Input value={name} required={true} onChange={handleNameChange} />
              <Tooltip className="d-inline">
                <i className="k-icon k-i-info" title="The name of the Taxonomy" />
              </Tooltip>
            </div>

I would like to request a new Kendo React Grid column editing option so that users can navigate editable columns using the keyboard. This feature should be similar to "navigatable" option from Kendo jQuery grid example - https://demos.telerik.com/kendo-ui/grid/editing

Thanks.