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>

widget/decorations.go

@@ -93,7 +93,7 @@ func (d *Decorations) LayoutResize(gtx layout.Context, actions system.Action) {
 		}
 		st := clip.Rect(data.Rectangle).Push(gtx.Ops)
 		if rsz.Hover.Hovered(gtx) {
-			pointer.CursorNameOp{Name: action.CursorName()}.Add(gtx.Ops)
+			action.Cursor().Add(gtx.Ops)
 		}
 		rsz.Drag.Add(gtx.Ops)
 		pass := pointer.PassOp{}.Push(gtx.Ops)

widget/editor.go

@@ -626,7 +626,7 @@ func (e *Editor) layout(gtx layout.Context, content layout.Widget) layout.Dimens
 	}
 	e.requestFocus = false
 	defer clip.Rect(image.Rectangle{Max: e.viewSize}).Push(gtx.Ops).Pop()
-	pointer.CursorNameOp{Name: pointer.CursorText}.Add(gtx.Ops)
+	pointer.CursorText.Add(gtx.Ops)
 
 	var scrollRange image.Rectangle
 	if e.SingleLine {