Add TODO for confusing firstboot step id

Update changelog.

CHANGELOG.md

@@ -12,6 +12,7 @@ All notable changes to this project will be documented in this file.
 ### Changed
 - frontpage: Show app logos instead of generic icons.
 - Prevent anonymous users from accessing setup pages.
+- Firstboot, KVStore: merge old firstboot state fields.
 
 ## [0.12.0] - 2016-12-08
 ### Added

plinth/modules/first_boot/__init__.py

@@ -35,6 +35,7 @@ first_boot_steps = [
         'order': 0
     },
     {
+        # TODO: Rename this, or merge with 'firstboot_completed'.
         'id': 'firstboot_complete',
         'url': 'first_boot:complete',
         'order': 10