added tasks

Signed-off-by: Sébastien Boisvert <sebastien.boisvert.3@ulaval.ca>
a double click is two clicks therefore also a MouseDown event

Reviewed-by: Pier-Luc Plante <pier-luc.plante.1@ulaval.ca>
Signed-off-by: Sébastien Boisvert <sebastien.boisvert.3@ulaval.ca>