Mention that the Notes Layer needs to be enabled

(closes #1558)

data/core.yaml

@@ -1713,7 +1713,8 @@ en:
       copy_paste: "{copy_icon} **{copy}** and {paste_icon} **{paste}** let you duplicate features."
     notes:
       title: Notes
-      intro: "*Notes* are used to alert other users that a feature requires fixing or attention. Notes mark a specific location on the map. To view existing notes or add new ones, open the {data_icon} **{map_data}** panel and enable the {osm_notes} layer."
+      intro: "*Notes* are used to alert other users that a feature requires fixing or attention. Notes mark a specific location on the map. The notes layer is not enabled by default."
+      show_notes: "To enable the notes layer, open the {data_icon} **{map_data}** panel and click the checkbox for {osm_notes}, or press `{shift}`+`{toggle_notes_key}`."
       add_note_h: "Adding Notes"
       add_note: "To add a new note, press the {note_icon} **{note}** button on the toolbar above the map, or press the shortcut key `{add_note_key}`."
       place_note: "Next, place the new note on the map. With a mouse, position the cursor where the note should go and {mouse_left_icon} left-click. On a touchscreen, {onefinger_tap_icon} tap the location."

data/l10n/core.en.json

@@ -2133,7 +2133,8 @@
       },
       "notes": {
         "title": "Notes",
-        "intro": "*Notes* are used to alert other users that a feature requires fixing or attention. Notes mark a specific location on the map. To view existing notes or add new ones, open the {data_icon} **{map_data}** panel and enable the {osm_notes} layer.",
+        "intro": "*Notes* are used to alert other users that a feature requires fixing or attention. Notes mark a specific location on the map. The notes layer is not enabled by default.",
+        "show_notes": "To enable the notes layer, open the {data_icon} **{map_data}** panel and click the checkbox for {osm_notes}, or press `{shift}`+`{toggle_notes_key}`.",
         "add_note_h": "Adding Notes",
         "add_note": "To add a new note, press the {note_icon} **{note}** button on the toolbar above the map, or press the shortcut key `{add_note_key}`.",
         "place_note": "Next, place the new note on the map. With a mouse, position the cursor where the note should go and {mouse_left_icon} left-click. On a touchscreen, {onefinger_tap_icon} tap the location.",

modules/ui/intro/helper.js

@@ -100,6 +100,7 @@ export function helpHtml(context, id, replacements) {
       add_note_key: l10n.t('modes.add_note.key'),
       help_key: l10n.t('help.key'),
       shortcuts_key: l10n.t('shortcuts.toggle.key'),
+      toggle_notes_key: l10n.t('map_data.layers.notes.key'),
 
       // reference localized UI labels directly so that they'll always match
       save: l10n.t('save.title'),

modules/ui/panes/help.js

@@ -168,6 +168,7 @@ export function uiPaneHelp(context) {
     ]],
     ['notes', [
       'intro',
+      'show_notes',
       'add_note_h',
       'add_note',
       'place_note',