DragEvent coordinates are rounded to nearest integer when Item scale is a real value other than 1

The DragEvent x and y coordinates are declared as real but are incorrectly rounded to the nearest integer when the scale of an Item is set to a real value, e.g. 1.1. For example, a Rectangle with a scale of 1.1 which contains a DropArea, the x and y coordinates of the DragEvent when a drag enters the bounds of the DropArea are rounded to the nearest integer.

To reproduce the issue, run the attached example project:

1. The scale of the rectangles is set to 1.1 (can be changed via the slider)
2. Enter with the cursor on the blue rectangle containing a MouseArea. Observed/Expected behavior: console prints the real value of the mouse coordinates.
3. Drag the green rectangle onto the red rectangle containing a DropArea. Observed behavior: console prints the DragEvent coordinates as rounded integers. Expected behavior: console prints the real value of the DragEvent coordinates.