UI - Implemented tray icon

UI - Moved dialog service to the shared UI project
UI - Implemented autorun

src/Artemis.UI.Shared/Screens/Dialogs/ConfirmDialogViewModel.cs

@@ -0,0 +1,30 @@
+using Artemis.UI.Shared.Services.Dialog;
+
+namespace Artemis.UI.Shared.Screens.Dialogs
+{
+    public class ConfirmDialogViewModel : DialogViewModelBase
+    {
+        public ConfirmDialogViewModel(string header, string text, string confirmText, string cancelText)
+        {
+            Header = header;
+            Text = text;
+            ConfirmText = confirmText;
+            CancelText = cancelText;
+        }
+
+        public string Header { get; }
+        public string Text { get; }
+        public string ConfirmText { get; }
+        public string CancelText { get; }
+
+        public void Confirm()
+        {
+            Session.Close(true);
+        }
+
+        public void Cancel()
+        {
+            Session.Close(false);
+        }
+    }
+}