Update menu entries and fixes some profile picture problems.

Added help pages too.

_output/navigation/learn_romhacking.json

@@ -3,7 +3,7 @@
     "display_order": 100,
     "navigation_type_id": "basic",
     "type_config": {
-        "link": "{$xf.options.homePageUrl}/pages/learn",
+        "link": "{{ link('help/learn-romhacking') }}",
         "display_condition": "",
         "extra_attributes": {
             "icon": "graduation-cap"