v4.0

• changed: don't remember query in support ticket tabs
• changed: minimal requirement set to Elgg 3
• changed: moved my support tickets menu item to account in topbar
• changed: moved plugin init to bootstrap class and elgg-plugin.php
• fixed: comment and close support ticket
• fixed: faq search
• fixed: faq tag filter not working with multiple tags
• fixed: limit number of tag suggestions in faq sidebar
• fixed: no tag notifications
• fixed: notification event handling
• fixed: search
• fixed: show correct help contexts
• fixed: support ticket notifications
• fixed: use correct getter in sidebar
• removed: faqs no longer sorted by likes count
• removed: replaced custom delete actions with a generic one