Same style for worksheet title and rest of header

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26324 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Fixing the text of comments

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26325 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
After checking them, fixing the comments again

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26326 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e