[ADF-5247] always enabled language picker (via extensions) (#1730)

* always enabled language picker

* fix tests

* update e2e tests

* fix aos plugin

docs/extending/rules.md

@@ -166,7 +166,6 @@ The button will be visible only when the linked rule evaluates to `true`.
 | 1.8.0 | canManagePermissions                | Checks if user can manage permissions for the selected node.             |
 | 1.8.0 | canToggleEditOffline                | Checks if user can toggle **Edit Offline** mode for selected node.       |
 | 1.8.0 | user.isAdmin                        | Checks if user is admin.                                                 |
-| 1.9.0 | app.canShowLanguagePicker           | Whether language picker menu should be present or not.                   |
 | 1.9.0 | app.canShowLogout                   | Whether logout action should be present or not.                          |
 | 1.12.0 | app.isLibraryManager               | Checks if user is library manager.                                       |
 

docs/getting-started/internationalization.md

@@ -123,19 +123,3 @@ Now, if you run the application and click the "New > Create Folder" menu,
 the title of the dialog should look like the following:
 
 ![](../images/aca-i18n-01.png)
-
-## Language picker
-
-You can enable internal language picker in the `app.config.json` file:
-
-```json
-{
-    ...,
-
-    "languagePicker": true,
-
-    ...
-}
-```
-
-![](../images/aca-i18n-02.png)

docs/ja/getting-started/internationalization.md

@@ -124,19 +124,3 @@ ADF リソースの翻訳を提供することもできます。
 ダイアログのタイトルは次のようになります:
 
 ![](../images/aca-i18n-01.png)
-
-## 言語ピッカー
-
-`app.config.json` ファイルで内部言語ピッカーを有効にできます:
-
-```json
-{
-    ...,
-
-    "languagePicker": true,
-
-    ...
-}
-```
-
-![](../images/aca-i18n-02.png)