New dialogs for inserting/complementing/deleting

[routeconverter]

A new prerelease is ready... the version I have just uploaded offers 3 new dialogs which you can open via the 3 buttons with the green/blue/red line:

• Inserting of waypoints as discussed in this thread and inserting of waypoints with geocoding
• Completion of all positions with coordinates (new), elevation, place, postal address, speed - which was (and is) available through Ctrl-A and the context menu
• Deletion of positions - the slighly reworked "Remove duplicate positions" dialog
  

I know this is far from perfect, but I'm very interested in your comments. What should be improved?