Fix #1929

  MetroDataGridCheckBox style prevents the CellEditEnding

Author: punker76

docs/release-notes/1.5.0.md

@@ -101,3 +101,4 @@
 - [#2812](https://github.com/MahApps/MahApps.Metro/issues/2812) Font family in Flyout.xaml and MetroNavigationWindow.xaml
 - [#2764](https://github.com/MahApps/MahApps.Metro/issues/2764) Flyout - Border not shown
 - [#2515](https://github.com/MahApps/MahApps.Metro/issues/2515) NumericUpDown Value not displayed
+- [#1929](https://github.com/MahApps/MahApps.Metro/issues/1929) MetroDataGridCheckBox style prevents the CellEditEnding

src/MahApps.Metro/MahApps.Metro/Styles/Controls.DataGrid.xaml

@@ -19,6 +19,10 @@
                 <Setter Property="Focusable" Value="False" />
                 <Setter Property="IsHitTestVisible" Value="False" />
             </DataTrigger>
+            <DataTrigger Binding="{Binding Path=IsEditing, RelativeSource={RelativeSource AncestorType=DataGridCell}}" Value="False">
+                <Setter Property="Focusable" Value="False" />
+                <Setter Property="IsHitTestVisible" Value="False" />
+            </DataTrigger>
         </Style.Triggers>
     </Style>