The current monitor used was the 'default' one, the primary monitor
but if your default monitor was the laptop one, with the lid closed
like mine was for quite a bit, you'd spend like 20 minutes trying to
find the preferences dialog, like I did.

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

The QString behaves faster if used with const - reference on
a QForeach.

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

if an unknown string was passed to createInnerDockidget,
the widget would not be created but a reference to the null
pointer would still be saved on the avaliable dock widgets,
and thus any code that foreached the list accessing methods
could led to a crash.

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

Since it's just a state-toogler, use the return value of the
method to set the values directly.

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

Plus lots of other tweaks to ui for visuals

Mostly accomplished by delay loading Qml elements

This reverts commit 86f29adf.

This is in preparation for full Qml main window

Main toolbar: Clearly indicate that we do not have battery indication (and the battery is not just flat at 0.0V

- Delete all old map code

- select active vehicle
- arm/disarm
- select flight mode