Make User-Agreement work with new 'WizadPanel'. [CURA-6057]

resources/qml/WelcomePages/UserAgreementContent.qml

@@ -83,7 +83,7 @@ Item
         onClicked:
         {
             CuraApplication.writeToLog("i", "User declined the User Agreement.")
-            base.passLastPage()
+            base.endWizard()
             CuraApplication.closeApplication() // NOTE: Hard exit, don't use if anything needs to be saved!
         }
     }

resources/qml/WelcomePages/WizardPanel.qml

@@ -28,11 +28,13 @@ Item
     signal showNextPage()
     signal showPreviousPage()
     signal goToPage(string page_id)  // Go to a specific page by the given page_id.
+    signal endWizard()
 
     // Call the corresponding functions in the model
     onShowNextPage: model.goToNextPage()
     onShowPreviousPage: model.goToPreviousPage()
     onGoToPage: model.goToPage(page_id)
+    onEndWizard: model.atEnd()
 
     Rectangle  // Panel background
     {