Grid row drag and drop capabilities enhancement request.

Currently, in order to drop a row from one Grid into another empty Grid, adding a placeholder row to the empty Grid with custom logic is required: https://demos.telerik.com/kendo-ui/grid/drag-drop

It would be nice to have a more robust drag and drop functionality that doesn't rely on custom logic to such an extent.

Please ensure that FilterableMessageBuilder configurations are applied to the Filter's menu when it is placed within a ColumnMenu or expose configurations to control the messages of the Filter menu within the GridColumnMenuMessagesBuilder.

Here is an example REPL that showcases the configuration doesn't have effect

  .Filterable(f => f.Messages(m =>
    {
        m.And("Custom And");
        m.Or("Custom Or");
    }))

unless ColumnMenu() is commented out.

It would be beneficial if the Grid exposes a built-in option for explicitly setting an arrow indicator for selected rows similar to the following:

Is it possible to add an "attributes" option to the editable.window configuration that allows the addition of HTML attributes to the window?

For example:

//HtmlHelper Grid
@(Html.Kendo().Grid<OrderViewModel>()
     .Name("grid")
      ...
     .Editable(editable => editable.Mode(GridEditMode.PopUp).Window(wnd => wnd.HtmlAttributes(new { @class= "my-custom-window" })))
)

//Kendo UI for jQuery Grid
  $("#grid").kendoGrid({
    ...
    editable: {
      mode: "popup",
      window: {
        attributes: {
          "class": "my-custom-window"
        }
      }
    }
  });

Is it possible to implement binding of TimeSpan property to TimeDurationPicker editor?

For example:

@model TimeSpan?

@(Html.Kendo().TimeDurationPickerFor(m => m))

I have noticed that neither the HtmlHelper nor the TagHelper wrappers of the Grid's Pageable.Pagesize configuration support the all option to be configured as a page size.

This is unlike the Kendo UI for jQuery pageSize option which supports it as per the example in the API:

 pageable: {
    pageSizes: [2, 3, 4, "all"],
    numeric: false
  }

When a Grid that has a DateTime column is exported to Excel that column doesn't get its width automatically like columns bound to other types of data.

An explicit Width needs to be set for the DateTime column as evident in this Telerik REPL.

Could you please fix the columns.autoWidth of the kendo.ooxml.Workbook to work for all types of data?

Is it possible to add an option to enable/disable the valuePrimitive of the DropDownList editor of a Foreign Key column in the Grid? This way, the ForeignKey column can be configured to allow null values.

Currently, calling the ClientTemplate method of the Grid's ToolBar overrides any previously defined commands. 

It would be really useful to expose an option to use the Template component to define a custom command for the Grid's ToolBar, instead of having to rewrite the entire TollBar in the ClientTemplate configuration.

I have a model with configured Display and Required DataAnnotation.

However the TagHelper Grid doesn't serialize them because it is lacking a configuration property to bind to a Model like the HtmlHelper does:

@(Html.Kendo().Grid<Kendo.Mvc.Examples.Models.CustomValidationProductViewModel>() 
        .Name("grid")      
        ...
 )

Can this capability be implemented for the TagHelper as well?

Expose the ability to specify an Edit Form Type mode for the Grid similar to the Telerik UI for ASP.NET AJAX control:

https://demos.telerik.com/aspnet-ajax/grid/examples/data-editing/edit-form-types/defaultcs.aspx