Proprietary CSS fixes in app.html for event handling

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25009 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Changing giac.js to the latest version in web/kickstart.xml

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25011 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Only do the font estimate for non-LaTeX captions.

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25012 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e