staop datagrid edit popups staying on top when application loses focus. #issue 493 part 2

Author: ButchersBoy

MaterialDesignThemes.Wpf/Themes/MaterialDesignTheme.DataGrid.xaml

@@ -1,7 +1,8 @@
 <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                     xmlns:wpf="clr-namespace:MaterialDesignThemes.Wpf"
-                    xmlns:converters="clr-namespace:MaterialDesignThemes.Wpf.Converters">
+                    xmlns:converters="clr-namespace:MaterialDesignThemes.Wpf.Converters"
+                    xmlns:controlzEx="clr-namespace:ControlzEx">
 
     <ResourceDictionary.MergedDictionaries>
         <ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/materialdesigntheme.checkbox.xaml" />
@@ -70,9 +71,9 @@
             <Setter.Value>
                 <ControlTemplate TargetType="{x:Type TextBox}">
                     <Grid>
-                        <Popup IsOpen="True" AllowsTransparency="True" Placement="RelativePoint" HorizontalOffset="-6" VerticalOffset="-6" 
-                               PlacementTarget="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type DataGridCell}}}"                                                              
-                               PopupAnimation="Fade">
+                        <controlzEx:PopupEx IsOpen="True" AllowsTransparency="True" Placement="RelativePoint" HorizontalOffset="-6" VerticalOffset="-6" 
+                                            PlacementTarget="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type DataGridCell}}}"                                                              
+                                            PopupAnimation="Fade">
                             <Grid>
                                 <AdornerDecorator CacheMode="{Binding RelativeSource={RelativeSource Self}, Path=(wpf:ShadowAssist.CacheMode)}">
                                     <Border Background="{DynamicResource MaterialDesignPaper}" CornerRadius="2"
@@ -115,7 +116,7 @@
                                     </Grid>
                                 </Border>
                             </Grid>
-                        </Popup>
+                        </controlzEx:PopupEx>
                     </Grid>
                 </ControlTemplate>
             </Setter.Value>