Currently, Safari implements this feature, and I would like to see it in Orion as well. It would be helpful to display the list of open tabs under the window title in the sidebar. Additionally, it would be nice to select a tab (or multiple tabs) and drag and drop them between windows or groups.
I am aware that it's possible to show vertical tabs, but that only shows the current window open tabs and doesn't enable dragging and dropping in other windows/groups.
