Add user info, require authentication to edit a note

data/core.yaml

@@ -275,8 +275,8 @@ en:
     localized_translation_language: Choose language
     localized_translation_name: Name
   zoom_in_edit: Zoom in to edit
-  login: login
-  logout: logout
+  login: Log In
+  logout: Log Out
   loading_auth: "Connecting to OpenStreetMap..."
   report_a_bug: Report a bug
   help_translate: Help translate
@@ -630,6 +630,9 @@ en:
     close_comment: Close and Comment
     open_comment: Reopen and Comment
     report: Report
+    login: You must log in to change or comment on this note.
+    upload_explanation: "Your comments will be publicly visible to all OpenStreetMap users."
+    upload_explanation_with_user: "Your comments as {user} will be publicly visible to all OpenStreetMap users."
   help:
     title: Help
     key: H