[WFS provider] Avoid dangling download progress dialog #30039
Merged
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While investigating #27384, which I failed to reproduce, I noticed
another - minor - issue when loading layers from a local GeoServer
instance. Very often (easily triggered by reloading layers with F5),
one or several download progress window would be displayed ~ 4 seconds
after the refresh had finished. This was due to a race between the
creation and destruction of this window.