Remove timeout on update

4e44392 added a default timeout to AJAX requests.
That broke update buttons because source update requests are expected to be long running.

Let's remove the timeout for that cases again.

public/js/selfoss-events-entries.js

@@ -207,7 +207,8 @@ selfoss.events.entries = function() {
                 content.html(articleList);
                 $('#content').removeClass('loading');
                 alert($('#lang').data('error_refreshing_source') + ' ' + errorThrown);
-            }
+            },
+            timeout: 0
         });
     });
 

public/js/selfoss-events-navigation.js

@@ -204,7 +204,8 @@ selfoss.events.navigation = function() {
             },
             complete: function() {
                 $('#nav-refresh').removeClass('loading');
-            }
+            },
+            timeout: 0
         });
     });