Given that I have a Parent item named 'Blog' with 3 sub-items (A, B, C)

Steps to reproduce:
1. Hide a sub-item e.g. B.
The content tree reflects the change and shows the item with a grey background

2. Hide the Parent 'Blog'.
The content tree reflects the change and shows the parent and all the sub-items with a grey background

3. Reveal the Parent 'Blog'

Error: Parent and all the sub-items are shown as visible in the tree even though the sub-item 'B' is still hidden

Expected: Sub-item B should still have a grey background.