Updates the RequiresExecution logic so we can skip steps based on some user input (i.e. skip the starter kit installation). Fixes the start kit js stuff to update the model correctly and continue. Fixes the error view to restart - it cannot just go back because there might not be a view there.

src/Umbraco.Web/Install/InstallSteps/DatabaseConfigureStep.cs

@@ -101,7 +101,7 @@ namespace Umbraco.Web.Install.InstallSteps
             get { return ShouldDisplayView() ? base.View : ""; }
         }
 
-        public override bool RequiresExecution()
+        public override bool RequiresExecution(DatabaseModel model)
         {
             return ShouldDisplayView();
         }