Draft: CardsGridLayout binding loop fix proposal

Greetings, a long time ago, I reported a binding loop issue within CardsGridLayout and at that time I didn't know what to do.

What I propose is:

• a parent item widget that is transparent and always takes up the space where the scrollbar should be
• the current scrollbar becomes a child item of the previously mentioned parent item and show/hide it as we do it right now.

Also: the current CardsGridView already has lots of space on the right side by default, so this shouldn't cause any problems.

Feel free to share your opinions