Fix: Error when calling the PostActions view-post callback

[sejas]

What?

• Closes PostAction View Post returns an error #63457

Fixes the error thrown when clicking PostActions View post in the editor.

Why?

In #63120 we added support for onActionPerformed at action level, but I've observed the object is undefined in all the cases.

I could check. onActionPerformed is only used at hook level instead. If we need to remove the logic that unpacks argsObject, I'm happy to update this PR or open a new one.

How?

Add a condition in case the callback options argsObject is undefined.

Testing Instructions

1. Go to edit a post. For example /wp-admin/post.php?post=1&action=edit.
2. Open the console in Chrome Dev Tools
3. Click in the three dots to open the Actions dropdown menu.
4. Click in View
5. Observe there are not any issues in the console
6. Observe the browser did open a new window with the post frontend

Testing Instructions for Keyboard

Screenshots or screencast

Before

post-action-view-before.mp4

After

post-action-view-after.mp4

[github-actions]

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Co-authored-by: sejas <antoniosejas@git.wordpress.org>
Co-authored-by: Mamaduka <mamaduka@git.wordpress.org>
Co-authored-by: youknowriad <youknowriad@git.wordpress.org>

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[github-actions]

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[sejas]

@jorgefilipecosta , could you take a look if this is the right direction for this fix? Thank you!

[Mamaduka]

I can reproduce the error, and the fix makes sense.

I'm not super familiar with post actions, so will leave final approval to @jorgefilipecosta.

[youknowriad]

This makes sense to me 👍

[jorgefilipecosta]

Tha change look good, thank you for this fix 👍

[andrewserong]

I just cherry-picked this PR to the release/18.8 branch to get it included in the next release: e0afea2