Apm stuff v2

Airframe Configuration Icons

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>

Uploaded new .svg icons referring to Airframe Configuration screen.
Deleted .png files.
Signed-off-by: Carlos Felipe <carlos.felipe@intel.com>

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

Using proper Fact testing to test if the WiFi Bridge is present.

Virtual joystick improvments

Add missing Radio Component trigger

New QGCFlickable control

- Positions are bounded to rectangle
- No longer re-centers if thumbs go outside bounds
- ThumbPad moves to meet first thumb position, this prevents
inadvertent movement as you put your thumb down

Add missing MockLink params

Prevent incorrect param binding while switching component id

Add scroll height indicators to Flickable

Stop paying attention to heartbeats while downloading logs.

Set initial size for log download.

Reboot message no longer needed

Clip parameter row strings

Since parameter system will pop message based on meta data

Joystick: Fix throttle center point.

Show ESP8266 Firmware Version in Summary Panel

The lines removed set the center point of the throttle axis to one extreme of the joystick range. This causes an offset value when the stick is centered if the joystick does not return exactly zero. This is important for vehicles with reversible throttle, such as ground robots or boats.

APM 3.2 support

Stop connection lost handling during accel cal

Move GCS heartbeat to MultiVehicleManager