navigator axis position in xAxis array should always be at the end position or removed
Currently the navigator is positioned at number 2 point in the axis array if new axis are dynamically added otherwise it is the last element. This makes indexing int the axis array unnecessarily complicated and confusing. I want that the navigator array either be taken out of the xAxis array and have its own array or at least have a consistent position
Use the xAxis.options.className to filter out the navigator axis.