Substitute Array.find call in layer-list.js since it is not supported by most browsers
Set the name of the WMS layers to the layer id instead of 'WMS Layer'. In the future, layers can be obtained with map.getLayersByName() using the layer identifier
Restrict lang parameter usage for requests. It is removed from communication.js so individual calls should include the parameter when needed. LangFilter is only applied to /config.js (ConfigServlet), which is the only servlet that uses the parameter.