Removed a bad margin

prs.desktop/Panels/Tasks/TasksByUserControl.xaml

@@ -123,8 +123,7 @@
                     CornerRadius="5,5,0,0"
                     Grid.Row="0"
                     Height="30"
-                    Padding="2"
-                    Margin="0,0,0,5">
+                    Padding="2">
                     <DockPanel>
                         <Label DockPanel.Dock="Left" Content="Search" Margin="5,0,0,0" />
                         <Button DockPanel.Dock="Right" x:Name="Export" Padding="10,0" Margin="5,0,0,0" Content="Export"