Possible changes to instant sharing custom messages feature

[UVLabs]

• Allow saving of custom instant messages for posts that are in Pending, so that when being reviewed, the post would already have custom messages.

Usecase:

Writer entering custom share messages
Admin altering those custom messages or choosing to publish as is

• Allow saving of custom instant messages for scheduled posts. Right now this feature solely depends on if the option is checked in the general settings of ROP. But if a post is a draft, and a user saves it as "scheduled" with custom instant share messages, then when that post changes from "scheduled" to "published" and the share is triggered. It should pull the custom share message one it exists.

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Change this:

https://github.com/Codeinwp/tweet-old-post/blob/v8511/includes/admin/class-rop-admin.php#L707

Add check for custom messages here:

https://github.com/Codeinwp/tweet-old-post/blob/v8511/includes/admin/class-rop-admin.php#L786

Or here (might be better here):

https://github.com/Codeinwp/tweet-old-post/blob/v8511/includes/admin/models/class-rop-queue-model.php#L325