Marked some fields as final

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26341 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Preview fixed in Touch

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26342 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Typo fixes


git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26343 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e