Implemented opening/saving themes

Filtration.Common/ViewModels/FiltrationViewModelBase.cs

@@ -0,0 +1,17 @@
+using System.Runtime.CompilerServices;
+using Filtration.ObjectModel.Annotations;
+using GalaSoft.MvvmLight;
+
+namespace Filtration.Common.ViewModels
+{
+    public class FiltrationViewModelBase : ViewModelBase
+    {
+        /// This gives us the ReSharper option to transform an autoproperty into a property with change notification
+        /// Also leverages .net 4.5 callermembername attribute
+        [NotifyPropertyChangedInvocator]
+        protected override void RaisePropertyChanged([CallerMemberName]string property = "")
+        {
+            base.RaisePropertyChanged(property);
+        }
+    }
+}