#3985 Web.gwt.xml reverted

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@31658 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
#3871 progress implementing in PNaCl in GeoGebraWeb further

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@31660 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Some TODO resolved and more changes. (Auto create slider - #3490)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@31661 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e