WYSIWYG Editors: Inconsistent collapsible block header double click behaviour

[ssddanbrown]

Describe the Bug

In tinymce we provide the ability to set the label via double clicking the header bar:

BookStack/resources/js/wysiwyg-tinymce/plugins-details.js

Lines 204 to 207 in 5a4f595

	editor.on('dblclick', event => {
	if (!getSelectedDetailsBlock(editor) || event.target.closest('doc-root')) return;
	showDetailLabelEditWindow(editor);
	});

This however fails for nested collapsible blocks, and is not supported in the new WYSIWYG editor.
This behaviour should be aligned.

Steps to Reproduce

1. Edit page in a WYSIWYG editor.
2. Insert a collapsible block, and another within the first.
3. Test double clicking header bars.

Expected Behaviour

Double clicking header bar should consistently provide the option to edit the label.

Screenshots or Additional Context

No response

Browser Details

No response

Exact BookStack Version

v25.12.9