Clicking outside the dialog should hide it.

As a user I would like to have Unfocused state for selected GridViewCells when SelectionMode="Cell". 
Similar to the Unfocused state for selected GridViewRows (you can check this article as a reference: http://​www.telerik.com/help/wpf/gridview-selection-unfocused-state.html).

QueryableEntityCoreCollectionView internal collections not in sync.

Currently, there is no workaround to this behavior.

Right now, if you programmatically increase the RadGridView's font size, the columns get bigger to accommodate. So far, so good. But if you then make the font size smaller, the columns stay the same large-font width. 

Further, double-clicking the gridsplitter that separates the columns after the above procedure doesn't resize the column like it would if you'd manually resized the column and then double-clicking the gridsplitter - instead, nothing happens.

Finally, it would be nice to have a programmatic interface to autosize the columns, something like

MyGrid.Columns(0).AutoSize()

Thanks!

Excessive CPU usage when GroupRenderMode is set to Flat, RowDetailsTemplate is used and RowDetailsVisibilityMode is set to Visible. This issue is not reproduced only with Material,  Office2016,  Office2016Touch and Windows8Touch themes.

The fix for this issue will be available with the next LIB (version 2018.3.1126) expected on Monday, November 26.

The reason for the performance issues is the size of the ItemsSource for the combo column and the internal lookup logic.

A new IsLightweightModeEnabled property of GridViewComboBoxColumn will be introduced with R2 2016. Its default value is False. 
When set to True, the new lightened lookup logic is triggered, thus the performance of the column is significantly increased.

Currently, you can navigate through the items in the distinct values list using the arrow keys. This changes the focused item. If you want to check/uncheck the currently focused item you need to press Tab in order to move the focus from the content presenter of the ListBoxItem to the CheckBox control.

Allow check/uncheck of the currently focused item using the keyboard (by pressing the Enter or Space key).

Currently search tries to match the search value to the complex object value, which always provides negative results. Adding such property will enable search over a primitive type, or string property of the given object.

You are able to resize columns using the columns gripper. The corresponding group will be automatically resized. We can provide a way to resize the column groups. The columns inside the group will be automatically resized with the group.

When a gridview is placed in TabControl, the following CodedUI tests will fail:

Test 1. Click on a column header to sort by that column.

Test 2. Click on a drop-down button to filter a column.

Test 3. Drag a column to group by it. 

An implicit style could be added:

<Style TargetType="telerik:FilteringControl" BasedOn="{StaticResource FilteringControlStyle}">
   <Setter Property="Background" Value="{telerik:FluentResource ResourceKey=AlternativeBrush}" />
</Style>

Numeric cells are exported in string format.

The RowValidating event arguments give information about the edit operation that triggered the row validation - None, Edit or Insert. However, when the edit is canceled the EditOperationType is set to Edit. Change this and provide a new value (Cancel) or use None when the validation is canceled.