nautilus-files-view : Remove flashing empty folder view on toggling show hidden files

Earlier on toggling "Show Hidden Files" in a empty folder flashed the empty folder view.
Now it's checked if the empty folder view is visible, depending on which the loading
operation is invoked.
Fixes: GNOME/nautilus#164
1 job for wip/antares/hiddenFiles in 4 minutes and 27 seconds (queued for 21 minutes and 24 seconds)
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build-nautilus

00:04:27