Edit button in Worksheet GUI

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26790 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
(More) correct height of browse GUI

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26791 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e