JBIDE-18145 Remove extra added content types from JBoss Tools HTML Editor's Text Viewer Configuration.

The extra Angular JS content type is removed from the HTML Editor's configured content type.

Signed-off-by: vrubezhny <vrubezhny@exadel.com>
[JBIDE-17992] Show Tern/Modules configuration under different category
Updated parent pom to 4.2.0.CR2