Client: fix regression in HEAD of master

Link: https://github.com/sebhtml/Ray-Cloud-Browser/issues/32
Signed-off-by: Jean-François Erdelyi <jean-francois.erdelyi.1@ulaval.ca>
Client: add double click

Link: https://github.com/sebhtml/Ray-Cloud-Browser/issues/5
Signed-off-by: Jean-François Erdelyi <jean-francois.erdelyi.1@ulaval.ca>