New undo and redo button (white instead of green and yellow)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26053 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
More instanceof fixes

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26054 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
* avoid automatic label for polyhedrons in a list
* always create a Drawable for polyhedron (check if segment/polygon is label set to draw it)
* fix degenerate prisms (when regular polygon basis as less than 3 vertices)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26055 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
switched ggt url back to normal.

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26056 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
fix degenerate pyramids (when regular polygon basis as less than 3 vertices)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26057 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Fix for #3404

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26058 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e