Class converter wasn't registered for custom attributes of extensions after b301f92a, breaking highlighting, completion and rename for class references in such attributes (e.g. IDEA-140250). This reverts the problematic commit and adds tests for such cases.

Java: Don't offer the action "Replace with old-style switch" on empty 'switch' statement (IDEA-208270)

Java: Fixed missing default branch when converting 'switch' expression to a traditional 'switch' statement (IDEA-208296)

(cherry picked from commit efb922eb)

actions: improve fix of presentation of Java-specific New Project/Module action in non-java IDEs (IDEA-195719)

This is an improvement of the previous fix (7108be97). Now the naming logic is extracted to a method in NewProjectOrModuleAction interface, and variants for different actions are specified explicitly in ProjectBundle.properties. Also text isn't changed for actions on Welcome Screen.

devkit: fix highlighting of extension elements with default Tag and Attribute annotation values (IDEA-208354)

start-up visualizer: item chart should render items according to start time, not grouped by level (app, project)

canConvertToLambdaWithoutSideEffects: check if the method reference can be actually converted to lambda