IDEA-115897: clean filter right after pressing cross button
remove duplicated check
fixed PsiInvalidElementAccessException for invalid elements stored in PythonPathCache

clear PythonPathCache on pushLanguageLevel
fixed PY-14538 BUG: Invalid IPython Notebook generated by PyCharm 4.0
fixed PY-6518 Editing name of Python interpreter doesn't repaint "Python Interpreters" dialog
CR-IC-6875 - get rid of TypeSafeDataProvider
aware of boolean.class — kotlin creates primitive boolean class from javaClass<Boolean>()
don't create panel for titlePane if not needed
cleanup
sample code in code style settings preview: added initializer block, corrected blank lines after initializer block behaviour
fix duplicates not detected in case they intersect: do not remove old fragments unless they are cheaper or fully contained in new fragment
a dirty fix for gdsl deadlock (IDEA-133502)
make DslActivationStatus thread-safe
platform: refactoring in the sake of better API
IDEA-130853 (HTTP redirects in library downloader)
IDEA-132699 (HTTP redirects in source provider)
Merge remote-tracking branch 'origin/master'
IDEA-127182 decompile to debuggable style when possible - correctly map lines from stack traces
Merge remote-tracking branch 'origin/master'
[git] IDEA-132502 fix NPE