Ungrouped layers no longer attempt to create a single instance per 'group' (as there isnt really a group at all). This means that init/update calls are now correctly paired.
This unblocks us to work on developing the layering system more, but needs discussion as to how we develop this in the future.
Also fix odd alightment issue with layer interface details.
#rb Jurre.deBaare
#ROBOMERGE-SOURCE: CL 8420328 via CL 8424969
#ROBOMERGE-BOT: (v404-8404397)
[CL 8425119 by thomas sarkanen in Main branch]