Improve the support of Narrator with parenthesis (#368)

* Modify how we manage Narrator with parenthesis and refactor right parenthesis

* Optimization

* remove extra spaces

* take feedback into account

src/Calculator/Views/CalculatorScientificOperators.xaml

@@ -11,8 +11,6 @@
              x:Name="ControlRoot"
              d:DesignHeight="400"
              d:DesignWidth="315"
-             Loaded="OnLoaded"
-             Unloaded="OnUnloaded"
              mc:Ignorable="d">
     <UserControl.Resources>
         <converters:BooleanNegationConverter x:Key="BooleanNegationConverter"/>
@@ -729,10 +727,10 @@
                                    Style="{StaticResource ParenthesisCalcButtonStyle}"
                                    FontSize="19"
                                    AutomationProperties.AutomationId="openParenthesisButton"
-                                   AutomationProperties.Name="{Binding LeftParenthesisAutomationName}"
                                    ButtonId="OpenParenthesis"
                                    Content="("
-                                   Tag="{x:Bind Model.OpenParenthesisCount, Mode=OneWay}"/>
+                                   GotFocus="OpenParenthesisButton_GotFocus"
+                                   Tag="{x:Bind ParenthesisCountToString(Model.OpenParenthesisCount), Mode=OneWay}"/>
         <controls:CalculatorButton x:Name="closeParenthesisButton"
                                    x:Uid="closeParenthesisButton"
                                    Grid.Row="8"