cleanup — add "deprecated" annotations
update tree ui to avoid problems with cached background (BasicTreeUI sets bg to trees)
removed code cache size flushing, it seems to cause code cache fragmentation and/or  JVM crash for all tests
appengine: fixed starting enhancer for latest versions of SDK
make another IG test light
IDEA-127594 ("Type may be weakened" inspection suggests deprecated type)
suggest more accessible class in "Type may be weakened" inspection