Automatic update of propset svn:ignore via for svnignore.txt's by svnignore

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@32226 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
(dummy) 3D view displayed in web

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@32227 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
#3947 uncommented updatePreview()

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@32228 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e