Major Feature #1587
Create a frontend user tagging plugin pi2
Create a plugin pi2 which will be responsible for frontend user tagging.
There should be a form similar to the backend using AJAX calls to get a "find as you type field" for user input.
Administrator should be able to setup a folder to save the newly created tags to and to switch between moderated and unmoderated tagging.
The rest should be similar to the setup of the other plugins - just setup a section for each taggable table.