Logging enable

Fix for the GCS menu. It was toggling the wrong entry when collecting
logs from the GCS. This also enables logging on both Colibri and
Quanton. The external flash is now

 - 65536 bytes for settings (logfs)
 - 65536 bytes for waypoints (logfs)
 - 4063232 bytes for logs (streamfs)

The arena size for the logfs is now reduced to 1638 bytes. This means there
are four arenas in these two partitions (each of which holds 64 settings)
allowing up to 64 * 3 unique settings to be saved.