P: Hovering over a preset previews it but clicking on it doesn't apply it
To date, there have been over a dozen reports of the following: When the user hovers the mouse over a preset in the Presets panel, the preset is correctly previewed in both the Navigator and Loupe (main) views. But when the user clicks on the preset to apply it, it doesn't get applied to the photo, and moving the mouse away restores the photo's previous appearance.
For most of these reports, resetting preferences fixes the problem.
These previous reports will be merged here to make it easier for users with this problem to find the authoritative thread.
