Fix: The issue of appender button not clickable in row/stack group.

[vipul0425]

What?

Fixes #56438

Why?

For core/group block that:

• Has the layout attribute value of {"type": "flex"}, i.e. a Row or Column variation.
• Has no inner blocks.
• Has a single value in its allowedBlocks attribute.

One cannot click on the button appender component to insert a block.

How?

The issue was caused as the pointer-events were restricted on the .block-list-appender, So this PR allows the pointer event on the button inside so user can insert the block.

Testing Instructions

1. Create a new Page.
2. Paste the group code provided further below.

<!-- wp:group {"allowedBlocks":["core/paragraph"],"layout":{"type":"flex"}} -->
<div class="wp-block-group"></div>
<!-- /wp:group -->

3. In visual mode, attempt to click on the block appender button. Now, the block should be inserted.

Testing Instructions for Keyboard

Nil

Screenshots or screencast

demo.mov

[github-actions]

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[github-actions]

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[talldan]

Thanks so much for the fix, @vipul0425!