Sync size of CAS panel and CAS view

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@23155 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Splash refinements

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@23156 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e