UI Tweaks for all mobile platforms.

During tests, if the airframe was configured to be an 'X' type
we showed just 'X' on the airframe type. It's correct but a
single letter - specially an X - made users think that it was
a error code, not the airframe name. So, because of that, also
show the vehicle type - a wrong value, but elucidative for users.
Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>

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

Change all text to have a qsTr call, this way it will
call the right translated text when needed.
Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>

- Sensors summary now shows you how man compasses you have
- Fix for APM accel cal. Can only use first accel offsets.

I removed some needed headers from a top level file which then causes a
ripple effect downstream

I know that some people belive that goto's are devil's work
but sometimes (like chaining if/elses for failures) it can
actually simplify the code for a better readability and
improved speed.
Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>

Strings can be expensive to create, all the issues with allocation,
copy of the char members, conversion to UTF-16. QStringLiteral creates
one in compile time.
Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>

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

virtual marks a method for inclusion on a v-table, but we don't want
the methods of classes that won't be inheritable to have a v-table,
we want, however, to issue a warning if somebody try to inherit
that specific class and reimplement those methods.
Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>

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

Add scroll height indicators to Flickable

First commit of modernizarion of Qt signal connections,
the new signal connection is very userfull because of a few
nice things:

- it's checked at compile time instead of runtime
- it can connect to any function or method, so we don't need
to use slots anymore
- it's way faster because it doesn't need to work with string
comparisson, but it's basically a direct call.
Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>

Users are getting confused because we are missing images. Will put back
new fancy version once we get new airframe config plus auto-generate of
images sorted out.