New Database settings page

Implements Recycle Bin (new group creation still needs to be implemented)
Code refactoring

ModernKeePass/Pages/SettingsPageFrames/SettingsDatabasePage.xaml

@@ -0,0 +1,22 @@
+<Page
+    x:Class="ModernKeePass.Pages.SettingsDatabasePage"
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:local="using:ModernKeePass.Pages"
+    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    xmlns:viewModels="using:ModernKeePass.ViewModels" 
+    mc:Ignorable="d">
+    <Page.Resources>
+        <CollectionViewSource x:Name="RecycleBinGroups" Source="{Binding Groups}" />
+    </Page.Resources>
+    <Page.DataContext>
+        <viewModels:SettingsDatabaseVm />
+    </Page.DataContext>
+    
+
+    <StackPanel Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
+        <ToggleSwitch Header="Recycle bin" OffContent="Disabled" OnContent="Enabled" IsOn="{Binding HasRecycleBin, Mode=TwoWay}" />
+        <ComboBox ItemsSource="{Binding Source={StaticResource RecycleBinGroups}}" SelectedItem="{Binding SelectedItem, Mode=TwoWay}" IsEnabled="{Binding HasRecycleBin}" />
+    </StackPanel>
+</Page>

ModernKeePass/Pages/SettingsPageFrames/SettingsDatabasePage.xaml.cs

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+// The Blank Page item template is documented at http://go.microsoft.com/fwlink/?LinkId=234238
+
+namespace ModernKeePass.Pages
+{
+    /// <summary>
+    /// An empty page that can be used on its own or navigated to within a Frame.
+    /// </summary>
+    public sealed partial class SettingsDatabasePage
+    {
+        public SettingsDatabasePage()
+        {
+            InitializeComponent();
+        }
+    }
+}