UI - Large amount of memory improvements in the VMs

Core - Minor memory improvements

src/Artemis.UI/Screens/Module/ProfileEditor/Visualization/CanvasViewModel.cs

@@ -1,10 +1,24 @@
-using Stylet;
+using System;
+using Stylet;
 
 namespace Artemis.UI.Screens.Module.ProfileEditor.Visualization
 {
-    public class CanvasViewModel : PropertyChangedBase
+    public abstract class CanvasViewModel : PropertyChangedBase, IDisposable
     {
         public double X { get; set; }
         public double Y { get; set; }
+
+        protected virtual void Dispose(bool disposing)
+        {
+            if (disposing)
+            {
+            }
+        }
+
+        public void Dispose()
+        {
+            Dispose(true);
+            GC.SuppressFinalize(this);
+        }
     }
 }