Add drag and drop events on QGVMapQGView class

[leonardooyama]

I was trying to implement some drag and drop functionality to an application I am maintaining using QGeoView and after some research, I concluded that I would need to modify the class QGVMapQGView and implement some event handlers:

void dragEnterEvent(QDragEnterEvent event) override;
void dragMoveEvent(QDragMoveEvent event) override;
void dropEvent(QDropEvent *event) override;
void dragLeaveEvent(QDragLeaveEvent *event) override;

Are there plans to add this to mouse interactions currently supported?