All rotatable node selection boxes should be as symmetrical as
possible so that rotating a node without moving the cursor won't
change which node the cursor is pointed at by resizing the
rotated selection box out of the way, which can cause repeated
right-clicking to miss and hit another node.
Prisms were corrected for this some time ago. Lenses were
apparently close enough that this was missed, or considered not
important enough, but this change makes things much more
consistent, including making the lens and prism hitboxes match.
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