Check if requested Instance is running (#759)

Preventing a dead lock when the requested instance from local store is not running. 
If it is not running we will now delete the lastSelectedInstance and switch back to index 0.

Author: janpfischer

assets/webconfig/js/ui_utils.js

@@ -107,8 +107,12 @@ function loadContent(event, forceRefresh)
 	var tag;
 
 	var lastSelectedInstance = getStorage('lastSelectedInstance', false);
-	if(lastSelectedInstance && (lastSelectedInstance != window.currentHyperionInstance))
-		instanceSwitch(lastSelectedInstance);
+
+	if (lastSelectedInstance && (lastSelectedInstance != window.currentHyperionInstance))
+		if (typeof(window.serverInfo.instance[lastSelectedInstance].running) !== 'undefined' && window.serverInfo.instance[lastSelectedInstance].running)	
+			instanceSwitch(lastSelectedInstance);
+		else
+			removeStorage('lastSelectedInstance', false);
 
 	if(typeof event != "undefined")
 	{