fixup! Implement widgets command

Author: pavelkraleu

src/textual_dev/previews/widgets.py

@@ -36,7 +36,7 @@
 WIDGETS = {
     "Button": button_example,
     "Checkbox": checkbox_example,
-    "ContentSwitcher": content_switcher_example,
+    # "ContentSwitcher": content_switcher_example,
     "DataTable": data_table_example,
     "DirectoryTree": directory_tree_example,
     "Footer": footer_example,