Fixing task 1 - click on DSP menu entry --> content area does not show
the right view
Task 2 - DSP/demo/constraints - textarea should show the content of the
selected file.
Task 4 - textarea should show the content of the file
/RDFValidation/src/main/webapp/WEB-INF/classes/SPIN/defaultNamespaceDeclarations.ttl
make h3 accordion font size smaller