Closed Issue: Show/Hide problem [9974]

If I have two dockable contents in one dockable pane, and when I hide both dockable contents, and then try to show them, they don't show in the same dockable pane.
After a close inspection, I concluded that when the DockablePane does not contain items it gets removed.
It should not be removed if this same dockable pane is in SavedStateAndPosition.ContainerPane variable. So I made a patch that does that.
It checks if the dockable content is in SavedStateAndPosition and removes it accordingly.
Now when you hide dockable contents and show them again, they all appear where they used to be.
Comments: Old or obsolete issue. Please ask for reopen if needed in version 2.0