Save persistently that default identity is created

In 943a4213fb default identity creation
  burst has been solved but some times the duplication happens in
  sequent instances of the app, now te app store permanently if default
  identity has been created so this other kind of duplication is avoided
  too (hopefully)

retroshare-qml-app/src/Contacts.qml

@@ -20,6 +20,7 @@ import QtQuick 2.7
 import QtQuick.Controls 2.0
 import org.retroshare.qml_components.LibresapiLocalClient 1.0
 import "." //Needed for TokensManager singleton
+import Qt.labs.settings 1.0
 
 Item
 {
@@ -63,7 +64,6 @@ Item
 		rsApi.request("/identity/*/", "", refreshContactsCallback)
 	}
 
-	property bool _refreshOwnCallback_creating: false
 	function refreshOwnCallback(par)
 	{
 		console.log("contactsView.refreshOwnCallback(par)", visible)
@@ -76,10 +76,10 @@ Item
 			contactsView.own_gxs_id = json.data[0].gxs_id
 			contactsView.own_nick = json.data[0].name
 		}
-		else if (!_refreshOwnCallback_creating)
+		else if (!settings.defaultIdentityCreated)
 		{
 			console.log("refreshOwnCallback(par)", "creating new identity" )
-			_refreshOwnCallback_creating = true
+			settings.defaultIdentityCreated = true
 
 			var jsonData = { "name": mainWindow.pgp_name, "pgp_linked": false }
 			rsApi.request(
@@ -203,4 +203,12 @@ Item
 				  "</pre>"
 		}
 	}
+
+	Settings
+	{
+		id: settings
+		category: "contactsView"
+
+		property bool defaultIdentityCreated: false
+	}
 }