allow (modal) dumb mode from rename refactoring (it can rename module files or root directories, EA-71117 - Throwable: DumbServiceImpl.scheduleCacheUpdate)

goto class: do nothing if the selected element is already invalidated (EA-71065 - PIEAE: StubBasedPsiElementBase.getContainingFile)

1) if file size is small.
2) for ZipInputStream, in native code it reads the data in 8K chunks anyway

no dumb mode permission assertion when already in dumb mode (https://youtrack.jetbrains.com/issue/IDEA-143007#comment=27-1061564)

ProjectView: allow redefining "library home" location string in ProjectViewDirectoryHelper subclasses

more clever filtering out runtime exception during particular index data calculation to propagate indexer's exception instead of marking index to rebuild (IDEA-143023)

Document,getLineCount() will return 0 for empty document. "number of last line" is calculated as "getLineCount() - 1", leading to '-1' and exception.

method duplicates: check all outer classes for hierarchy inheritance not to make resulted method static