[5.1] Add toolbar buttons in language installation toolbar

[jgerman-bot]

New language relevant PR in upstream repo: joomla/joomla-cms#42610 Here are the upstream changes:

Click to expand the diff!

diff --git a/administrator/components/com_installer/src/View/Languages/HtmlView.php b/administrator/components/com_installer/src/View/Languages/HtmlView.php
index 4cd75a8a0c5ae..0081169df0382 100644
--- a/administrator/components/com_installer/src/View/Languages/HtmlView.php
+++ b/administrator/components/com_installer/src/View/Languages/HtmlView.php
@@ -16,7 +16,6 @@
 use Joomla\CMS\Language\Text;
 use Joomla\CMS\MVC\View\GenericDataException;
 use Joomla\CMS\Toolbar\Toolbar;
-use Joomla\CMS\Toolbar\ToolbarHelper;
 use Joomla\Component\Installer\Administrator\View\Installer\HtmlView as InstallerViewDefault;
 
 // phpcs:disable PSR1.Files.SideEffects
@@ -75,15 +74,19 @@ public function display($tpl = null)
      */
     protected function addToolbar()
     {
-        $canDo   = ContentHelper::getActions('com_installer');
+        $canDo   = ContentHelper::getActions('com_languages');
         $toolbar = Toolbar::getInstance();
 
-        ToolbarHelper::title(Text::_('COM_INSTALLER_HEADER_' . $this->getName()), 'puzzle-piece install');
+        if ($canDo->get('core.manage')) {
+            $toolbar->linkButton('list', 'COM_INSTALLER_TOOLBAR_MANAGE_LANGUAGES')
+                ->url('index.php?option=com_languages&view=installed');
+            $toolbar->linkButton('comments', 'COM_INSTALLER_TOOLBAR_MANAGE_CONTENT_LANGUAGES')
+                ->url('index.php?option=com_languages&view=languages');
+            $toolbar->divider();
+        }
 
-        if ($canDo->get('core.admin')) {
-            parent::addToolbar();
+        parent::addToolbar();
 
-            $toolbar->help('Extensions:_Languages');
-        }
+        $toolbar->help('Extensions:_Languages');
     }
 }
diff --git a/administrator/language/en-GB/com_installer.ini b/administrator/language/en-GB/com_installer.ini
index fa3a097afedcf..0522dc8f2c372 100644
--- a/administrator/language/en-GB/com_installer.ini
+++ b/administrator/language/en-GB/com_installer.ini
@@ -229,6 +229,8 @@ COM_INSTALLER_TOOLBAR_FIND_UPDATES="Check For Updates"
 COM_INSTALLER_TOOLBAR_INSTALL="Install"
 COM_INSTALLER_TOOLBAR_INSTALL_EXTENSIONS="Install Extensions"
 COM_INSTALLER_TOOLBAR_MANAGE="Manage Extensions"
+COM_INSTALLER_TOOLBAR_MANAGE_CONTENT_LANGUAGES="Content Languages"
+COM_INSTALLER_TOOLBAR_MANAGE_LANGUAGES="Manage Languages"
 COM_INSTALLER_TOOLBAR_PURGE="Clear Cache"
 COM_INSTALLER_TOOLBAR_UPDATE="Update"
 COM_INSTALLER_TYPE_CLIENT="Location"

[tecpromotion]

We can wait for joomla/joomla-cms#42663