Debugger - Added quick access button to main window

Debugger - Bring debugger to front if already open instead of creating a new one

src/Artemis.UI/Services/Interfaces/IDebugService.cs

@@ -0,0 +1,7 @@
+namespace Artemis.UI.Services.Interfaces
+{
+    public interface IDebugService : IArtemisUIService
+    {
+        void ShowDebugger();
+    }
+}