Transparent icon for menu (3D graphics)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35219 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
design for StyleBarW (not finished); bugfixes

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35220 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
4.9.293.0

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35221 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e