This makes text show up better on map images

Added a second polygon. This polygon is updated from the first polygon at each mouse click and is what will ultimately be saved upon completion of drawing.

- Offline maps new set defaults to default map type
- Plan/Fly views use MapScale control

Android done.

UI Tweaks for all mobile platforms.

Also additional major Mission usability changes

Also remove concept of “interactive” since it is no longer needed

Also show QGC position on map

Pinch zoom doesn’t seem to be working for some reason

Tweaking MapType and MapCenter icons
Added Zoom Plus/Minus icons to be used for maps
Added PiP icon for the upcoming Picture-in-Picture functionality

- New MissionManager
- Plumb MissionManager through MissionEditor
- Mission Editor supports get/set

- Only show video option if supported
- Persist settings
- Show/Hide/Add items correctly

- Restructured a number of MissionItem properties as well