Only allow to add 4 custom layers
We don't let users add the same basemap again
Fixes concat error in the basemap dropdown chooser
new CartoDB text added to public embed page
Merge remote-tracking branch 'origin/fix/CDB-282' into release/2.2.2
added cartodb message in share map preview
Merge remote-tracking branch 'origin/feature/CDB-630' into release/2.2.2