[BUGFIX] Graphical selection tool close button
[BUGFIX] Graphical selection tool close button

First part of #438 (graphical) selection tool: stop "button"

makinacorpus/lizmap-web-client,3liz/lizmap-web-client,laurentj/lizmap-web-client,rldhont/lizmap-web-client,jancelin/lizmap-web-client,aeag/lizmap-web-client,rldhont/lizmap-web-client,jancelin/lizmap-web-client,rldhont/lizmap-web-client,jancelin/lizmap-web-client,makinacorpus/lizmap-web-client,3liz/lizmap-web-client,jancelin/lizmap-web-client,nboisteault/lizmap-web-client,makinacorpus/lizmap-web-client,aeag/lizmap-web-client,makinacorpus/lizmap-web-client,3liz/lizmap-web-client,jancelin/lizmap-web-client,nboisteault/lizmap-web-client,laurentj/lizmap-web-client,aeag/lizmap-web-client,jancelin/lizmap-web-client,laurentj/lizmap-web-client,laurentj/lizmap-web-client,aeag/lizmap-web-client,rldhont/lizmap-web-client,aeag/lizmap-web-client,nboisteault/lizmap-web-client,3liz/lizmap-web-client,nboisteault/lizmap-web-client,makinacorpus/lizmap-web-client