MIRTH-3858: Java 8 is now a minimum requirement. Various libraries have been upgraded to their JDK 8 counterparts where necessary. This includes Jetty and JSP dependencies (from 9.2.14 to 9.3.14), PostgreSQL JDBC (same version 9.4.1212, but to the JDBC 4.2 JAR), and HikariCP (2.3.2 to 2.5.1).
MIRTH-4060: Fixed issue with extensions using the code template panel during startup. Now the code template panel is initialized before plugins are started on the client side.