Whenever a view is moved, we should schedule a repaint for the outputs
the view is on. This avoids users having to do it by hand every time
they change something. There is no change in determinism of behaviour
(e.g. 'I can reconfigure views as often as I like and it won't take
effect until I schedule a repaint' isn't true, because output repaints
might happen for reasons outside your control).
Signed-off-by: Daniel Stone <daniels@collabora.com>
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