Workaround for #125

When starting the application and the SSH connection doesn't work, an error page is shown.

Author: RillJ

View/ServerError.xaml

@@ -0,0 +1,12 @@
+<Page x:Class="View.ServerError"
+      xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+      xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
+      xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
+      mc:Ignorable="d" 
+      Title="Fout">
+
+    <Grid>
+        <Label Content="Er ging iets mis met de verbinding met de server. Neem contact op met de administrators van Stugether." HorizontalAlignment="Center" VerticalAlignment="Center"/>
+    </Grid>
+</Page>

View/ServerError.xaml.cs

@@ -0,0 +1,15 @@
+using System.Windows.Controls;
+
+namespace View
+{
+    /// <summary>
+    /// Interaction logic for ServerError.xaml
+    /// </summary>
+    public partial class ServerError : Page
+    {
+        public ServerError()
+        {
+            InitializeComponent();
+        }
+    }
+}

ViewModel/MainPageViewModel.cs

@@ -25,8 +25,17 @@ public class MainPageViewModel : ObservableObject
         /// </summary>
         public MainPageViewModel()
         {
-            SSHService.Initialize(); // Initialize SSH for the database connection and logging in
-            MainNavigationItems = SetObservableCollection(false); // Initialize the default page list
+            // Initialize the default page list
+            MainNavigationItems = SetObservableCollection(false);
+
+            try
+            {
+                SSHService.Initialize(); // Initialize SSH for the database connection and logging in
+            }
+            catch (Exception)
+            {
+                MainWindowPage = "ServerError.xaml";
+            }
 
             // Subscribe a bunch of events to make certain other functions work
             ViewModelMediators.AuthenticationStateChanged += OnAuthenticationStateChanged;