List.js: avoid throwing errors when refreshRendering() gets called while the loading panel is present. Fixes #481
List.js: avoid throwing errors when refreshRendering() gets called while the loading panel is present. Fixes #481

tkrugg/deliteful,EAlexRojas/deliteful,EAlexRojas/deliteful,harbalk/deliteful,cjolif/deliteful,brunano21/deliteful,harbalk/deliteful,cjolif/deliteful,kitsonk/deliteful,tkrugg/deliteful,kitsonk/deliteful,brunano21/deliteful