Mission data all-in-one file

Recent advance in battery technologies greatly increases flight times and capability of affordable UAVs to execute long and complicated missions. In order to organize all mission planning and programming we need to have all mission data (waypoints, rally points, POI, ROI, etc) in one place with capability to save/load/edit (copy/cut/paste/delete) mission data. It could be .xml file. Also it would be great to have all data to be organized to hierarchic groups like places explorer tree in Google Earth.

The issue names no files, tests, or entry points. Begin by locating Mission Planner's existing mission-data handling and determine how waypoints, rally points, POIs, and ROIs are represented. Done would require a defined hierarchical model with save, load, and edit operations, but the issue does not specify the implementation location or acceptance tests.

Written by the indexing model from the issue text.