typo
class searching optimization
index property optimization
IDEA-114418 (Grails SDK of an dependency)
 -Dgrails.disable.structure.update=true should work for JDK synchronization.
cleanup
Copyright must not save empty settings +review
RootIndex: no package name for ignored directories
use ensureValid
file watchers tips should be in WS only

(cherry picked from commit 4a2dde3e1be841363e8b97affbf3676b2078affd)
IDEA-117073 Recent files and Switcher are not centred in ide window

(cherry picked from commit 0ef7db25bb00aeda9a8bdb58f9a8635a95140b12)
IDEA-117077 Can't remove files from Recent Files

(cherry picked from commit cfbafa02c82118e31846dfd8308257d9f8b1e014)