Comment 9 for bug 1873093

There is one important step for reproducing this bug, not only in gnome-terminal, but also in nautilus and gedit:
* open multiple tabs

* !!! reorder one of the tabs !!!

* leave pointer hovering over one of the tabs
* observe tooltip appearing, and cursor changing to reflect loss of focus in the tab window
* observe the next keypress not going to the tab window, but seemingly either the tooltip or the tab widget (not sure which); after this, focus returns to the tab window for subsequent input.