5.0.29.0

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@37538 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Remove export menu from tablets

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@37539 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
#4728 part 2

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@37540 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e