Toolbar keyevents started.

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@32889 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Fix for alpha in slider dialog

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@32890 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e