Fixes the issue with the popup remaining visible (fixed IsOpen in transition from Open to Closed)

Fixes the issue with the popups showing initially then hiding (removed initial state where IsOpened was being set to true only to be set to false).

Author: Keboo

MaterialDesignThemes.Wpf/Themes/Generic.xaml

@@ -522,12 +522,7 @@
                                     <VisualTransition From="Open" To="Closed">
                                         <Storyboard>
                                             <BooleanAnimationUsingKeyFrames Storyboard.TargetName="PART_Popup" Storyboard.TargetProperty="IsOpen">
-                                                <DiscreteBooleanKeyFrame Value="True" KeyTime="0:0:0" />
-                                                <DiscreteBooleanKeyFrame Value="True" KeyTime="0:0:0.3" />
-                                            </BooleanAnimationUsingKeyFrames>
-                                            <BooleanAnimationUsingKeyFrames Storyboard.TargetName="PART_Popup" Storyboard.TargetProperty="IsOpen">
-                                                <DiscreteBooleanKeyFrame Value="True" KeyTime="0:0:0" />
-                                                <DiscreteBooleanKeyFrame Value="True" KeyTime="0:0:0.3" />
+                                                <DiscreteBooleanKeyFrame Value="False" KeyTime="0:0:0.3" />
                                             </BooleanAnimationUsingKeyFrames>
                                             <DoubleAnimationUsingKeyFrames Storyboard.TargetName="PART_ContentCoverGrid" Storyboard.TargetProperty="Opacity">
                                                 <EasingDoubleKeyFrame Value="0.56" KeyTime="0" />
@@ -589,15 +584,14 @@
                                 <VisualState x:Name="Closed">
                                     <Storyboard>
                                         <BooleanAnimationUsingKeyFrames Storyboard.TargetName="PART_Popup" Storyboard.TargetProperty="IsOpen">
-                                            <DiscreteBooleanKeyFrame Value="True" KeyTime="0:0:0" />
                                             <DiscreteBooleanKeyFrame Value="False" KeyTime="0:0:0.3" />
                                         </BooleanAnimationUsingKeyFrames>
                                     </Storyboard>
                                 </VisualState>
                             </VisualStateGroup>
                         </VisualStateManager.VisualStateGroups>
                         <controlzEx:PopupEx IsOpen="False"
-                                          PlacementTarget="{Binding ElementName=DialogHostRoot, Mode=OneWay}"                                            
+                                          PlacementTarget="{Binding ElementName=DialogHostRoot, Mode=OneWay}"
                                           StaysOpen="True"
                                           AllowsTransparency="True"
                                           PopupAnimation="None"