[d]When the search/replace dialog is open[/d]
1) Activate primary window, Open search/replace dialog.
2) Drag a tab from primary window to a secondary window.
—> Tab is moved.
3) Activate the secondary window
4) Drag a tab from a secondary window to primary.
—> Tab is moved.
5) Activate the search replace dialog.
6) Activate the secondary window.
7) Drag a tab from a secondary window to primary.
—> Tab is NOT moved, pointer turns into a [+] and does nothing when the mouse-click is released into the primary window.