InputEventMouseButton "cancelled" variable description is unhelpful

**Your Godot version:** 4.2

**Issue description:**
The description of `InputEventMouseButton.cancelled` just says: "If true, the mouse button event has been cancelled.
I mean that is somewhat fair/clear for a double click, but what is the meaning of "cancelled"?

**URL to the documentation page (if already existing):**
https://docs.godotengine.org/en/4.3/classes/class_inputeventmousebutton.html