Hide "Page Type" dropdown in Pages Manager if only default types exist

[surajair]

Feature Request

In the Pages Manager UI, the "Page Type" dropdown should be hidden if there are no custom page types registered. The dropdown is only relevant when there are more than the default page types, which are "page" and "global". If only these defaults exist, the dropdown should be removed to simplify the UI and reduce user confusion.

Acceptance Criteria:

• The "Page Type" dropdown is not displayed unless there is at least one custom page type registered.
• "page" and "global" are always considered default types.
• UI logic checks for custom types before rendering the dropdown.

Notes:

• This change improves user experience and keeps the Pages Manager interface cleaner.
• Please ensure proper testing for cases with and without custom page types.