Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

This reverts commit ae976049ca7b4818616e6b8be07a028fc7dfc26f.

This mechanism automatically queues data into the correct thread where necessary, otherwise the method is invoked directly with low overhead.

At the same time remove the UDP socket event workaround. It is not a problem.

Plumb through initial object mode on Vehicle

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>

Also:
- Remove unused code

Moving methods from MainWindow to QGCApplication so that more things
can run without a window. Helpful for testing.

This function is called automatically when a QSettings object is destroyed,
so is rarely needed to be called explicitly.

There are still some cases where
a QSettings object is passed-by-reference, so there I left the sync() calls as
it's unclear how permanent those objects are and if they'd call sync() before
application shutdown