Lots of code refactoring to use XAML behaviors instead of code-behind

New Save button in the AppBar
EntryPage now uses the same AppBar as GroupPage (but not shared...)
Some new Symbol mappings

ModernKeePass/Pages/MainPage.xaml

@@ -0,0 +1,66 @@
+<Page
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    xmlns:viewModels="using:ModernKeePass.ViewModels" 
+    xmlns:controls="using:ModernKeePass.Controls"
+    x:Class="ModernKeePass.MainPage"
+    mc:Ignorable="d"
+    Background="{StaticResource ApplicationPageBackgroundThemeBrush}" >
+    <Page.DataContext>
+        <viewModels:MainVm />
+    </Page.DataContext>
+    <Page.Resources>
+        <CollectionViewSource 
+            x:Name="MenuItemsSource" 
+            Source="{Binding MainMenuItems}" 
+            IsSourceGrouped="True" />
+    </Page.Resources>
+
+    <Grid Background="{StaticResource ApplicationPageBackgroundThemeBrush}" >
+        <Grid.ColumnDefinitions>
+            <ColumnDefinition Width="Auto" />
+            <ColumnDefinition Width="50" />
+            <ColumnDefinition Width="Auto" />
+        </Grid.ColumnDefinitions>
+        <controls:ListViewWithDisable Grid.Column="0" 
+            x:Name="MenuListView"
+            RequestedTheme="Dark"
+            SelectionChanged="ListView_SelectionChanged" 
+            Background="{ThemeResource ApplicationPageBackgroundThemeBrush}"
+            ItemsSource="{Binding Source={StaticResource MenuItemsSource}}"
+            SelectedItem="{Binding SelectedItem, Mode=TwoWay}"
+            IsSynchronizedWithCurrentItem="False">
+            <ListView.Header>
+                <TextBlock Text="{Binding Name}" FontWeight="Bold" FontSize="36" Margin="20" />
+            </ListView.Header>
+            <ListView.ItemTemplate>
+                <DataTemplate >
+                    <StackPanel Orientation="Horizontal">
+                        <SymbolIcon Symbol="{Binding SymbolIcon}" />
+                        <TextBlock Text="{Binding Title}" Margin="10,5,0,0" />
+                    </StackPanel>
+                </DataTemplate>
+            </ListView.ItemTemplate>
+            <ListView.ItemContainerStyle>
+                <Style TargetType="ListViewItem">
+                    <Setter Property="Padding" Value="20,5,0,0" />
+                    <Setter Property="Margin" Value="0" />
+                </Style>
+            </ListView.ItemContainerStyle>
+            <ListView.GroupStyle>
+                <GroupStyle HidesIfEmpty="True">
+                    <GroupStyle.HeaderTemplate>
+                        <DataTemplate>
+                            <Grid Background="DarkGray" Margin="20,0,0,0">
+                                <Border Height="1" Width="240" HorizontalAlignment="Stretch"/>
+                            </Grid>
+                        </DataTemplate>
+                    </GroupStyle.HeaderTemplate>
+                </GroupStyle>
+            </ListView.GroupStyle>
+        </controls:ListViewWithDisable>
+        <Frame Grid.Column="2" Name="MenuFrame" Width="auto" Margin="0,60,0,0" />
+    </Grid>
+</Page>