Removed incorrect Vehicle.altitudeWGS84

Plumb through initial object mode on Vehicle

- Also fix vehicle selector dropdown in toolbar

Add scroll height indicators to Flickable

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

Also show QGC position on map

Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>

Selected flight mode is controller by firmware. Use selecting flight
mode cannot set the check, or it will be wrong if firmware declines
change.

gcc 4.8 seems to have a problem with connections directly
to a QPointer.
also, cleared a unused call wich resulted in error on OSX
Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>

Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>

We rely in Qt 5.4+
Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>

Also, changed an if(true) then true; else false; code
Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>

We there relying on the old Sygnal Slot sintax, but QWidget
didn't had one of it's children methods. pass the children
directly.
Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>

Now I'v discovered a Slot that returns a bool, this is not very
good because Qt expects a slot to have the same return type
as the signal, void, always.
Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>

Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>

There are many ways of iterating over lists in C++/Qt.
In the specific case of QStrings, it is known [1] that using
foreach with const references avoids the creation of new
QString objects in each iteration, reducing the time consumed
by the loops.

[1] https://blog.qt.io/blog/2009/01/23/iterating-efficiently/Signed-off-by: Anselmo L. S. Melo <anselmo.melo@intel.com>

that was connected to showNormal, which always led to a smaller
minimized window irrespective of whether the applicaton was
full screen or not. Now it checks and always returns to maximized.