Propagate opacity and interactive properties to mission items
Set opacity to 0.5 for items that are not part of the current
edit view

Stable update

Bring back visual sequence number in map item indicators

When a child item is current show the parent as selected

Support for new TakeoffMissionItem and Takeoff Tool 

More work on mission item indicators

Toggle Rally Point insertion on/off.
Highlight current Rally Point and current Waypoint.
Use tab bar instead of a row of radio buttons for selection (Mission, Fence, Rally).
Fix QGCHoverButton to handle proper checked state toggle.
Get rid of the many arrays used to define behaviors for the ToolStrip. They are now all defined within its model.
Fixed color for disabled text within ToolStrip (it was invisible)

Fixed found bugs

Plus many load/save fixes

Plus new unit tests

Plus more overall ui work

- Restructured a number of MissionItem properties as well

This is the Pixhawk research board, not the PX4 production board.

Erros casused by all of the mergedd branches are now fixed for qgroundcontrol.pro. Working on fixing the errors that now appeare in qgcunittest.pro.

qgcunittest.pro now compiles and runs as long as run in terminal in projcts->Run Settings is unchecked.