NPE on right-click

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@37935 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
add app-release.html with data-param-preRelease=false

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@37936 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e