After showing and closing the context menu by right-clicking in
View mode, the cursor would be set to ClosedHandCursor. Only
after another click the cursor would be set back to the regular
OpenHandCursor.
The issue can be fixed by not changing the cursor shape in the first
place for showing the context menu, i.e. when right-clicking.
While using the Red Eye Reduction tool, the patch will prevent
the unwanted placement of corrections on the canvas when right-clicking.
Fullscreen mode could be toggled by double-clicking the middle
mouse button, but it should only work for the left button.