[#2376] Fix bug in spliting maps from nomaps viz
[#2376] Fix bug in spliting maps from nomaps viz

Since split-with will split at first chance and the collection
is in a sense a random collection maps could end up in nomap.

akvo/akvo-dash,akvo/akvo-dash,akvo/akvo-lumen,akvo/akvo-dash,akvo/akvo-lumen