Touch: Allow deleting stuff from browser GUI directly

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26574 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Removed empty folders from SVN

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26575 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Make sure toValueString for MyList uses value form (OK for Giac for sure, not sure about other possible consequences)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26576 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
[giac] improve output form

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26577 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e