show images in the AlgebraView; bugfix for header (AlgebraView)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@31255 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
polygon triangulation (step 10 : intersection - very degenerated polygons)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@31256 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Ticket #4004: undoing someone's change, because \\ is really needed for LaTeX for MathQuill

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@31257 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e