cursor finally working properly and removed from render_text

src/core/rect.rs

@@ -29,7 +29,7 @@ impl Rect {
 
 impl Widget for Rect {
     fn draw(&mut self, painter: &mut Painter) {
-        painter.write(RectPrimitive {
+        painter.primitive(RectPrimitive {
             color: self.color,
             radius: self.radius,
             thickness: self.thickness,