'Invalid/undefined type' label added for targets in targets tab: https://github.com/charmeproject/charme_plugin/issues/88
Annotations no longer disappear from list view: https://github.com/charmeproject/charme_plugin/issues/87
If user navigates to different page without closing plugin, then returning to page via browser's back/forward buttons forces page reload: https://github.com/charmeproject/charme_plugin/issues/86
Moderation code ready for when node supplies 'moderator_of' property as discussed.
Flag button displays alert saying this functionality is due in January.
If annotation has a link but no comments, the link URI is used as the annotation title in list view.
Targets in targets tab listed alphabetically.
Other minor fixes.