app,io/pointer: [API] remove CursorNameOp and rename CursorName -> Cursor

It's now possible to directly user pointer.Cursor to add to the ops.

   pointer.CursorText.Add(gtx.Ops)

This is an API change. Use pointer.Cursor directly instead of CursorNameOp.

Signed-off-by: Egon Elbre <egonelbre@gmail.com>

app/os.go

@@ -163,7 +163,7 @@ type driver interface {
 	// Configure the window.
 	Configure([]Option)
 	// SetCursor updates the current cursor to name.
-	SetCursor(name pointer.CursorName)
+	SetCursor(cursor pointer.Cursor)
 	// Raise the window at the top.
 	Raise()
 	// Close the window.