Set perspective give "real embedded dimensions" to panels (needed for webGL canvas)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@33376 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Better test for alpha discard

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@33377 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Better test for alpha discard

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@33378 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
OGP: Make auxiliary objects visible (dashed)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@33379 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e