Linking Panes from the side panel

I recently discovered that, by putting the edit tab into the sidebar or next to the search button as a tab, you cannot have it linked to the preview tab. The one in the sidebar will not update to what page you have just clicked on. This of course works the same way if you put the preview tab in the sidebar instead.

It would be great to have more flexibility with where we can put our tabs and have them remain linked.