fix: user validation before displaying profile bar items

Updated 'getProfileBarCategories.php' to validate user session before displaying profile bar items. Previously, an error was thrown if a user was not found. Explicitly catching the exception to ensure a smoother user experience.

Related: order-guestorder#10 (closed)

merged

mentioned in commit 79b1b420

This MR is included in version 2.7.1

The release is available on GitLab release.

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