simplify handling of read-only files
EA-47691 (IOE: CheckUtil.checkWritable)
redundant cast: try to infer cast operand type from cast parent (fix testInferFromTypeCast)
 IDEA-110933 Database table editor: in editing mode attempt to move focus to different view immediately moves it back
passing a name to ModuleBasedConfiguration constructor is optional; kill a lot of code for passing around empty names
Merge remote-tracking branch 'origin/master'
NPE
compilation fix