Code style changes.

Signed-off-by: Jean-Yves Tinevez <jean-yves.tinevez@pasteur.fr>
Fix missing icons in toolbar config panel.

Signed-off-by: Jean-Yves Tinevez <jean-yves.tinevez@pasteur.fr>
Change the trackmate ImageJ tool icon.

Signed-off-by: Jean-Yves Tinevez <jean-yves.tinevez@pasteur.fr>