Prefer to keep this language key unique

Just in case we decide to call it something else on the dashboard
Revert #2709 (aec4591410)

modules/cms/lang/en/lang.php

@@ -18,7 +18,8 @@ return [
             'widget_title_default' => 'Website',
             'online' => 'Online',
             'maintenance' => 'In maintenance',
-            'manage_themes' => 'Manage themes'
+            'manage_themes' => 'Manage themes',
+            'customize_theme' => 'Customize Theme'
         ]
     ],
     'theme' => [

modules/cms/lang/ru/lang.php

@@ -17,7 +17,8 @@ return [
             'widget_title_default' => 'Веб-сайт',
             'online' => 'Онлайн',
             'maintenance' => 'в разработке',
-            'manage_themes' => 'Управление темами'
+            'manage_themes' => 'Управление темами',
+            'customize_theme' => 'Настройка Темы'
         ]
     ],
     'theme' => [

modules/cms/reportwidgets/activetheme/partials/_widget.htm

@@ -29,7 +29,7 @@
             <?php if ($theme->hasCustomData()): ?>
                 <li>
                     <a href="<?= Backend::url('cms/themes/update/'.$theme->getDirName()) ?>">
-                        <?= e(trans('cms::lang.theme.customize_theme')) ?>
+                        <?= e(trans('cms::lang.dashboard.active_theme.customize_theme')) ?>
                     </a>
                 </li>
             <?php endif ?>