Clean up msg_area_list module (standardize/etc.), update and add docs

docs/_includes/nav.md

@@ -68,6 +68,7 @@
     - [Who's Online]({{ site.baseurl }}{% link modding/whos-online.md %})
     - [User List]({{ site.baseurl }}{% link modding/user-list.md %})
     - [Message Conference List]({{ site.baseurl }}{% link modding/msg-conf-list.md %})
+    - [Message Area List]({{ site.baseurl }}{% link modding/msg-area-list.md %})
  
   - [Oputil]({{ site.baseurl }}{% link oputil/index.md %})
 

docs/modding/msg-area-list.md

@@ -0,0 +1,17 @@
+---
+layout: page
+title: Message Area List
+---
+## The Message Area List Module
+The built in `msg_area_list` module provides a menu to display and change between message areas in the users current conference.
+
+### Theming
+The following `itemFormat` object is provided to MCI 1 (ie: `%VM1`):
+* `index`: 1-based index into list.
+* `areaTag`: Area tag.
+* `name` or `text`: Display name.
+* `desc`: Description.
+
+The following additional MCIs are updated as the user changes selections in the main list:
+* MCI 2 (ie: `%TL2` or `%M%2`) is updated with the area description.
+* MCI 10+ (ie `%TL10`...) are custom ranges updated with the same information available above in `itemFormat`.