Save project resets IsDirty flag

Author: Wolff, Roald (DI FA HMI EE PRC3)

src/GuiRunner/TestModel.Tests/CreateNewProjectTests.cs

@@ -120,6 +120,7 @@ public void NewProject_IsNotDirty()
             Assert.That(project.IsDirty, Is.False);
         }
 
+        [Test]
         public void NewProjectIsNotDirtyAfterSaving()
         {
             var project = new TestCentricProject(_model, new[] { "dummy.dll" });