Document "# requires" in the plugin config (#6306)

* Document "# requires" in the plugin config
* Add missing line breaks in UIPluginApi documentation

ui/v2.5/src/docs/en/Manual/Plugins.md

@@ -65,8 +65,11 @@ Plugins provide tasks which can be run from the Tasks page.
 
 The basic structure of a plugin configuration file is as follows:
 
-```
+```yaml
 name: <plugin name> 
+# optional list of dependencies to be included
+# "#" is is part of the config - do not remove
+# requires: <plugin ID>
 description: <optional description of the plugin>
 version: <optional version tag>
 url: <optional url>
@@ -121,6 +124,8 @@ tasks:
 
 The `name`, `description`, `version` and `url` fields are displayed on the plugins page.
 
+`# requires` will make the plugin manager select plugins matching the specified IDs to be automatically installed as dependencies. Only works with plugins within the same index.
+
 The `exec`, `interface`, `errLog` and `tasks` fields are used only for plugins with tasks.
 
 The `settings` field is used to display plugin settings on the plugins page. Plugin settings can also be set using the graphql mutation `configurePlugin` - the settings set this way do _not_ need to be specified in the `settings` field unless they are to be displayed in the stock plugin settings UI.

ui/v2.5/src/docs/en/Manual/UIPluginApi.md

@@ -23,6 +23,7 @@ This namespace contains the generated graphql client interface. This is a low-le
 ### `libraries`
 
 `libraries` provides access to the following UI libraries:
+
 - `ReactRouterDOM`
 - `Bootstrap`
 - `Apollo`
@@ -149,6 +150,7 @@ InteractiveUtils.interactiveClientProvider = (
 ### `hooks`
 
 This namespace provides access to the following core utility hooks:
+
 - `useGalleryLightbox`
 - `useLightbox`
 - `useSpriteInfo`