Test fix for sensitive button when must be unsensitive

source/ubinstall-gtk.c

@@ -1806,6 +1806,10 @@ void on_page_navigation_clicked(GtkWidget *self, main_window *widgets){
                         }
                         if (!main_config.install_complete){
                             gtk_notebook_set_current_page(GTK_NOTEBOOK(widgets->Notebook),YON_PAGE_INSTALLATION);
+
+                            gtk_widget_set_sensitive(widgets->CancelInstallButton,0);
+                            gtk_widget_set_sensitive(widgets->NextButton,0);
+                            gtk_widget_set_sensitive(widgets->BackButton,0);
                         }
                     } else {
                         gtk_notebook_set_current_page(GTK_NOTEBOOK(widgets->Notebook),YON_PAGE_CONFIGURE_END);