plugin_configuration_file.md: Document skipForDefaultProject for the reference

topics/basics/plugin_structure/plugin_configuration_file.md

@@ -1510,6 +1510,7 @@ Children
   - [`<interface-class>`](#idea-plugin__application-components__component__interface-class)  ![Deprecated][deprecated]
   - [`<loadForDefaultProject>`](#idea-plugin__application-components__component__loadForDefaultProject)  ![Deprecated][deprecated]
   - [`<option>`](#idea-plugin__application-components__component__option)  ![Deprecated][deprecated]
+  - [`<skipForDefaultProject>`](#idea-plugin__application-components__component__skipForDefaultProject)  ![Deprecated][deprecated]
 
 ##### `implementation-class`
 {#idea-plugin__application-components__component__implementation-class}
@@ -1619,6 +1620,29 @@ since 2020.1
 Required
 : no
 
+##### `skipForDefaultProject`
+{#idea-plugin__application-components__component__skipForDefaultProject}
+
+> Do not use it in new plugins.
+> See [Components](plugin_components.md) for the migration guide.
+>
+{style="warning"}
+
+In the past, if present, the component was not loaded for the default project.
+
+Currently, project components aren't loaded in the default project by default, so this element has no effect.
+Use [`<loadForDefaultProject>`](#idea-plugin__application-components__component__loadForDefaultProject)
+if it is required to load a component in the default project.
+
+{type="narrow"}
+Deprecated
+:
+since 2020.1
+
+{type="narrow"}
+Required
+: no
+
 ### `project-components`
 {#idea-plugin__project-components collapsible="true" initial-collapse-state="collapsed"}