Tabs can move outside the window bounds

[axeld]

First, you have to move a tab to the rightmost position, and then make the window smaller until the tab has to shrink. Then, when you make the window larger again, the tab starts growing again and leaving the left edge of the window at the same time, and thus is moved to the right too much (too early). Only resizing should be done until the tabsize no longer changes.

[revol@…]

fixed by hrev17653