Verify was failing due to incorrect READ_MULTI max size

Added conditional statement to disable the virtualTabletJoystick output if a real joystick is connected and enabled. Without this, two different sets of values would be sent and would appear highly sporadic.

This reverts commit bf31c808.

Allows QGC to run on Raspberry Pi 2 with direct framebuffer (X/startx
not needed). Memory split seems to need 128 for GPU. Qt5 needs to be
configured with "-opengl es2 -qpa eglfs -device linux-rasp-pi2-g++".

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>

bind1st and bind2nd are depreceated in C++11 because now we
have variadic templates, so remove them from the compile unit
if we are compilling in c++11 mode.
Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>