Added shared UI library and finished the ColorPicker

src/Artemis.UI/Screens/Workshop/WorkshopViewModel.cs

@@ -1,38 +1,18 @@
-using System;
-using System.ComponentModel;
-using System.Windows.Media;
+using System.Windows.Media;
 using Stylet;
 
 namespace Artemis.UI.Screens.Workshop
 {
     public class WorkshopViewModel : Screen, IScreenViewModel
     {
+        public Color TestColor { get; set; }
+        public bool TestPopupOpen { get; set; }
         public string Title => "Workshop";
 
-        public WorkshopViewModel()
+        public void UpdateValues()
         {
-            PropertyChanged += OnPropertyChanged;
-        }
-
-        private void OnPropertyChanged(object sender, PropertyChangedEventArgs e)
-        {
-            Console.WriteLine("Property changed:" + e.PropertyName);
-            Console.WriteLine(TestColor);
-        }
-
-        public Color TestColor { get; set; }
-
-
-        protected override void OnActivate()
-        {
-            TestColor = Color.FromRgb(255, 0, 0);
-            base.OnActivate();
-        }
-
-        protected override void OnDeactivate()
-        {
-            Console.WriteLine(TestColor);
-            base.OnDeactivate();
+            TestPopupOpen = !TestPopupOpen;
+            TestColor = Color.FromRgb(5, 174, 255);
         }
     }
 }