It would be a great help, if the order of documents in editor document tab groups could be changed in a dialog, not only by drag and drop of the tabs.
I suggest in the dialog Window/Documents (Shift F4), there should be tree view with tabgroups and tabs as nodes. There should be First, Up Down and Last buttons to move the selection in it's group. Drag and Drop in this tree would be easier than in the tab headers.
*** This bug has been marked as a duplicate of bug 204361 ***