can't navigate to non-code usage sometimes
fixed test data because of one less document loaded (see change 9464870 in SelfElementInfo)
reverted SafeVarargs because of Oracle license restrictions
isModified() fixed
IDEA-80056 Column selection mode improvement

adding fixtures and tests
IDEA-80056 Column selection mode improvement

updating editor fixtures to work for multiple carets
IDEA-120244 Native file dialog on "Install plugin from disk" disables ZIP files on OS X