This patch aims to improve user experience by not allowing the user to drag and drop a folder into itself.
The current behavior shows a red message at the top which can then be closed by the user, instead of relying on that, this patch disables the option of dropping onto self and uses the "Invalid drop target cursor" to highlight the behavior.
I, myself see the message occasionally when working with the laptop touchpad. Due to their nature, sometimes you perform drag-and-drop unwillingly.
Overall I think this is a positive change and also that I might need a better touchpad.
RFC: Whether the implementation by adding the two method to the base model was the best way to go about it.
BUG: 307747
Since spectacle is unable to screenshot the cursor overlay, find attached a photo of the screen.
{F3787651}