hide 'check now' btn to prevent confusion (IDEA-133587)
disable 'install plugin' header during plugin installation (IDEA-132815)
ensure reassign state is cleared
refactoring listeners: update file set scopes if class or package is renamed or moved (IDEA-119152)
SSR: simpler determination of valid searchable file type
SSR: matching for annotated new expressions
SSR: fix "lambdas" existing template
SSR: second attempt to fix NPE (EA-63773)
SSR: revert unneeded change
SSR: fix lambda matching problem
SSR: depend less on CCE's to fail matches
IDEA-132237 (action-friendly new channel notification)