Ticket #2971: fixed focus scroll problem in Chrome

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@23233 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
fixed FrequencyGgb to correctly override methods in Frequency 

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@23236 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e