fixed toggle problem with SymbolTablePopup button 

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@29298 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
improving text edit dialog: added new TextEditPanel with support for textarea editing and toolbar

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@29299 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e