[ENHANCEMENT] Baselayers - Choose active baselayer at map startup
[ENHANCEMENT] Baselayers - Choose active baselayer at map startup

The google layers are always drawn at the max level at the startup. To fix it, We have to listen the first drawn and redraw or undisplay.
Fixed #286

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