inconsistent cursor behavior

[pascalpp]

expected:

• when the mouse is over a ruler, should show the hand cursor.
• when the mouse is outside a ruler, should show the crosshair cursor.

actual:

• the cursors behave correctly when you first start the app, but they quickly get confused, sometimes showing the arrow cursor instead of the hand when over a ruler, sometimes showing the hand cursor when outside a ruler.

[pascalpp]

Closing this for now. Will open a new ticke to track NSCursor research.