[RNMobile] Gallery - Only run the linkTo saving on the web since it's not mobile related

[jd-alexander]

Fixes wordpress-mobile/gutenberg-mobile#2735

Description

#25582 introduced changes to utilize the image_default_link_type from options.php to set the default link for galleries.

The issue is that the logic being utilized in the useEffect hook that triggers the saving of the link doesn't work with mobile

gutenberg/packages/block-library/src/gallery/edit.js

Line 304 in 6f82c4b

useEffect( () => {

So the current solution is to disable this on mobile and only run it on the web.

How has this been tested?

This has been tested using the instructions below.

1. Add a Gallery Block to the canvas.
2. Press the undo button.
3. Notice that the Gallery block is now removed.

Previously, the block wouldn't be removed.

Screenshots

Before	After

Types of changes

Checklist:

• My code is tested.
• My code follows the WordPress code style.
• My code follows the accessibility standards.
• My code has proper inline documentation.
• I've included developer documentation if appropriate.
• I've updated all React Native files affected by any refactorings/renamings in this PR.

[guarani]

I'm having trouble undoing a gallery block on the web (although it's now working on mobile):

I haven't got around to checking if this is an existing issue though.

[guarani]

I haven't got around to checking if this is an existing issue though.

Checked on https://wordpress.org/gutenberg/ and I can reproduce this issue where I'm unable to undo the action of adding a Gallery block, so it isn't related to this PR.

I don't see this issue reported: https://github.com/WordPress/gutenberg/issues?q=is%3Aissue+undo+label%3A%22%5BBlock%5D+Gallery%22+

So I will go ahead and file a new issue for it. Could you please confirm @jd-alexander if you're able to reproduce this?

[guarani]

Approving since as noted in #26227 (comment), I confirmed that the issue where I'm unable to undo the action of adding a Gallery block is not caused by the changes in this PR.

Update: create #26367 to track this bug

Thanks @jd-alexander!

[jd-alexander]

Approving since as noted in #26227 (comment), I confirmed that the issue where I'm unable to undo the action of adding a Gallery block is not caused by the changes in this PR.

🙏

Update: create #26367 to track this bug

Thanks, I just checked and I was able to reproduce on the web as well. Super happy this bug was discovered.

Thanks @jd-alexander!

No prob 🙏

[jd-alexander]

@guarani I am going to close this PR as this one #26377 resolves the issue for both web and mobile 😄 I just switched to that branch and all was well.

[guarani]

Good work catching that! 👍