Fix CSS warnings and errors in map.css
Fix CSS warnings and errors in map.css

vscode found those warnings/errors

rldhont/lizmap-web-client,laurentj/lizmap-web-client,3liz/lizmap-web-client,laurentj/lizmap-web-client,nboisteault/lizmap-web-client,rldhont/lizmap-web-client,3liz/lizmap-web-client,rldhont/lizmap-web-client,laurentj/lizmap-web-client,3liz/lizmap-web-client,laurentj/lizmap-web-client,rldhont/lizmap-web-client,nboisteault/lizmap-web-client,nboisteault/lizmap-web-client,nboisteault/lizmap-web-client,3liz/lizmap-web-client