v2.3

• added: discussion widget from widget manager
• added: group_forum_topics widget from widget manager
• added: group_news widget from widget manager
• added: index_groups widget from widget manager
• added: group sidebar cleanup feature
• added: group profile fallback handling (error on old group profile link & redirect)
• added: group default access (if Elgg/Elgg#253 is applied)
• added: admin action to enable/disable group notifications
• added: option to show the group members in the group related index widgets
• removed: index_discussions widget
• fixed: deprecated notice in invitations overview
• fixed: url error in invitation
• fixed: PHP wanring in group_river_widget
• fixed: pagination in group members sidebar
• fixed: invite autocomplete not using default autocomplete features
• fixed: forum topics widget ordering
• changed: plugin settings layout