Drag-and-drop of waypoints in table view

[Sören Johansson]

It would be nice to have a drag-and-drop function to change the order of the waypoints in the table view. This feature could save some time. Right now you have to create a new waypoint and delete the old one to change the order.

[Reimar Bauer]

That is something similar

https://forum.qt.io/topic/56201/solved-how-to-get-options-on-right-click-of-mouse-in-a-tableview
https://www.reddit.com/r/Qt5/comments/4e609t/qtablewidget_right_click_menu_selectedrows_is/

we could move more options of table view to a context menu.
https://stackoverflow.com/questions/20930764/how-to-add-a-right-click-menu-to-each-cell-of-qtableview-in-pyqt

[Reimar Bauer]

It would be nice to have a drag-and-drop function to change the order of the waypoints in the table view. This feature could save some time. Right now you have to create a new waypoint and delete the old one to change the order.

[Reimar Bauer]

Added drag/drop in TableView.

Fix issue #230

→ <<cset 4cbfb33110af>>