UI plugin dependencies

in-app-manual/plugins.md

@@ -54,13 +54,20 @@ ui:
   # optional list of css files to include in the UI
   css:
     - <path to css file>
+
   # optional list of js files to include in the UI
   javascript:
     - <path to javascript file>
+
+  # optional list of plugin IDs to load prior to this plugin
+  requires:
+    - <plugin ID>
+    
   # optional list of assets 
   assets:
     urlPrefix: fsLocation
     ...
+
   # content-security policy overrides
   csp:
     script-src:
@@ -71,6 +78,7 @@ ui:
     
     connect-src:
       - http://alloweddomain.com
+
 # the following are used for plugin tasks only
 exec:
   - ...
@@ -89,6 +97,9 @@ The `exec`, `interface`, `errLog` and `tasks` fields are used only for plugins w
 The `css` and `javascript` field values may be relative paths to the plugin configuration file, or
 may be full external URLs.
 
+The `requires` field is a list of plugin IDs which must have their javascript/css files loaded
+before this plugins javascript/css files.
+
 The `assets` field is a map of URL prefixes to filesystem paths relative to the plugin configuration file.
 Assets are mounted to the `/plugin/{pluginID}/assets` path.