---------
Add new member 'Bool_t fHighlightOutline' that is set during the
outline-pass of the highlight.

TGLObject
---------
Disable use of display-lists for multi-colored objects only in the
outline pass of the highlight.

TGLPhysicalShape
----------------
Set HighlightOutline and HighlightOutline of the rnr-ctx during highlight.


git-svn-id: http://root.cern.ch/svn/root/trunk@24444 27541ba8-7e3a-0410-8455-c3a389f83636