Don't un-maximize panes when dragging a tab into a maximized set
Trying to (ab)use panes as somewhat like groups, I'm seeing very annoying behaviour -- described in subject.
Moreover, it's inconsistent cause when I'm dragging a tab into it doesn't show the whole setup but rather current maximised pane as the only one in the set. Only after finalising that drag-n-drop it all suddenly "unpacks". When you have 10 panes inside a tab they all become too tiny to have any sense to be displayed in that way. Everything inside them screws up really badly and it's a mess.