Created a Settings Service

Created a Recent Service
Created a Resources Service
Code refactor
Updated tests

ModernKeePassApp.Test/Mock/SettingsServiceMock.cs

@@ -0,0 +1,18 @@
+using System;
+using ModernKeePass.Interfaces;
+
+namespace ModernKeePassApp.Test.Mock
+{
+    public class SettingsServiceMock : ISettings
+    {
+        public T GetSetting<T>(string property)
+        {
+            return default(T);
+        }
+
+        public void PutSetting<T>(string property, T value)
+        {
+            throw new NotImplementedException();
+        }
+    }
+}