I am working on a thematic mapping platform showing data at local administrative levels. I have many layers, so I run into problems (see screenshot: http://gisintersect.com/many_layers.png).
Is there any way I can collapse groups of layers within the layer switcher? I have a high number of layers, as you can see in the switcher. Hence, I need some way to collapse/group/categorize the layers, so that I do not need to show all of them in the layerswitcher at once. The result is that layers drop outside the map, so either, there is a maximum number of layers, or there should be a better way to do it.