Add a dynamic Waypoint editor according to NAV_CMD_TYPE
Fix the Waypoint Editor Parameter value assignment
Moving the Waypoint dialog to a new package
Fixing references
Adding different layout files for each waypoint type
While developing on this branch use the planning screen at startup
Implementing some polymorphic dialog to minimize code duplication.
Implementing the Waypoint dialog.
Implementing the loiter dialogs
Implementing the Land, Takeoff and RTL dialogs
Extracting the dialog builder to a new class
Renaming dialog files
Fixing references
Create a new dialog if a different type of waypoint is selected
Renaming layout files so they correspond to the classes that handle them.
Fixing references
Merge branch 'master' into Waypoints
Merge pull request #284 from arthurbenemann/Waypoints

Add a dynamic Waypoint editor according to NAV_CMD_TYPE