Add settings button

Hyperbar.Windows/ApplicationBarView.xaml

@@ -15,7 +15,10 @@
         <x:Double x:Key="ButtonWidth">40</x:Double>
         <x:Double x:Key="ButtonHeight">40</x:Double>
     </UserControl.Resources>
-    <ItemsControl ItemTemplateSelector="{Binding Converter={windows:DataTemplateConverter}}" ItemsSource="{Binding}">
+    <ItemsControl
+        Margin="6,0,6,0"
+        ItemTemplateSelector="{Binding Converter={windows:DataTemplateConverter}}"
+        ItemsSource="{Binding}">
         <ItemsControl.ItemsPanel>
             <ItemsPanelTemplate>
                 <Grid>

Hyperbar.Windows/SecondaryView.xaml

@@ -4,7 +4,7 @@
     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
     xmlns:windows="using:Hyperbar.UI.Windows">
-    <Grid Width="300" Background="red">
+    <Grid>
         <ItemsControl ItemTemplateSelector="{Binding Converter={windows:DataTemplateConverter}}" ItemsSource="{Binding}">
             <ItemsControl.ItemsPanel>
                 <ItemsPanelTemplate>

Hyperbar.Windows/SettingsButtonView.xaml

@@ -3,5 +3,22 @@
     x:Class="Hyperbar.Windows.SettingsButtonView"
     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
-    <Button Content="dfffffff" />
+    <UserControl.Resources>
+        <SolidColorBrush x:Key="ButtonBackground" Color="Transparent" />
+        <SolidColorBrush x:Key="ButtonBorderBrush" Color="Transparent" />
+        <SolidColorBrush x:Key="ButtonBorderBrushPointerOver" Color="Transparent" />
+        <SolidColorBrush x:Key="ButtonBorderBrushPressed" Color="Transparent" />
+        <SolidColorBrush x:Key="ButtonBackgroundDisabled" Color="Transparent" />
+        <SolidColorBrush x:Key="ButtonBorderBrushDisabled" Color="Transparent" />
+        <Thickness x:Key="ButtonPadding">0</Thickness>
+        <x:Double x:Key="ButtonWidth">40</x:Double>
+        <x:Double x:Key="ButtonHeight">40</x:Double>
+    </UserControl.Resources>
+    <Button
+        Width="{ThemeResource ButtonWidth}"
+        Height="{ThemeResource ButtonHeight}"
+        Padding="{ThemeResource ButtonPadding}"
+        Content="&#xE713;"
+        FontFamily="{ThemeResource SymbolThemeFontFamily}"
+        FontSize="16" />
 </UserControl>