[Tooling Kernel 2.1-neo] Replace GEF3 with GEF4.
(from redmine: issue id 2636, created on 2016-07-12, closed on 2016-09-05)
- Relations:
- blocks #2656 (closed)
- blocks #2628 (closed)
(from redmine: issue id 2636, created on 2016-07-12, closed on 2016-09-05)