Layout selector popover appears when revisiting page that has an unfilled layouts block

[nickcernis]

Describe the bug
If I return to a page that has an ab-layout-selector-placeholder block where a layout has not been selected, I see the layout selector popover as soon as the editor loads.

I did not expect that popover to appear when re-visiting a page until I click “Layout Library”.

I would expect the popover to appear only when first adding a layout to a page, or when clicking the “Show Layouts” button for an existing layout placeholder where I dismissed the selection.

Not a big issue, but it can be disorientating to see the layout selector when visiting an old page that hasn't been edited for some time if it contains a layout placeholder where no selection was made.

To Reproduce
Steps to reproduce the behavior:

1. Click “Layouts” to display the Layout Selector.
2. Dismiss the layout selector.
3. Publish/update the page.
4. Refresh the editor.

You will see the layout selector immediately when the editor loads.

Version

• 2.0.2, develop

Device and browser information

• Chrome, macOS

Possible resolutions

1. Set modalOpen to false instead of true by default if possible, then have the buttons alter that state.

   atomic-blocks/src/blocks/block-layout/components/layout/layout-modal.js

   Line 27 in 517fc47

   modalOpen: true,

Or:

2. Consider removing the ab-layout-selector-placeholder block when dismissing the layout selection modal, because it may not need to exist if I intended to add a layout but then chose not to.
3. Consider removing ab-layout-selector-placeholder blocks when publishing/updating the page, because they represent a layout that was added but not chosen.