Implemented Batch Update Items - New Criteria (Tags, User Groups and more...)

[Bob]

As per title, I've updated the Batch Update Items feature in the Admin CP to include some new criteria.

• Tags
• Category (Include selected or Exclude selected)
• Item author in user groups
• Item author not in user groups
• Created in last x (Hours, Days, Weeks, Months, Years)
• Associated discussion thread reply count between