Problems with top level items

[zuphilip]

For top-level items, i.e. items shown under My Library directly the plugin has a problem, when it tries to check the child-collections, which then leas to an error:

[JavaScript Error: "TypeError: currentCollection.getChildCollections is not a function" {file: "chrome://zoteroopencitations/content/zoteroopencitations.js" line: 79}]

I guess that it is possible that currentCollection is null here.