Shows horizontal/vertical scroll indicators

Sony a6000 ILCE-6000 with 16mm lens.
Source : 
http://www.sony.co.uk/electronics/interchangeable-lens-cameras/ilce-6000-body-kit#product_details_default

it's not a typical APS-C sensor, proper size gives more accurate
calculations.

The 22mm as stated on the lens is actual, not 35mm equvalent as on smaller
cameras.  - So it was wrong to reverse calculate for crop factor.

(the name was already the longes one)

Also change Plan Element selection ui

- GeoFence support comes from plugin
- Circle fence support
- Better param support

rearrange layout

camera model and sensor size closer together

Conflicts:
	src/MissionEditor/SurveyItemEditor.qml
	src/MissionManager/ComplexMissionItem.cc
	src/MissionManager/ComplexMissionItem.h

first iteration of mission stats calculation (dist and maxTelem)

add survey item distance to mission distance

remove unused calculations from _calcHomeDist

added correct calculation of missionMaxTelemetry when there is a complex item

use speed to compute mission time according to vehicle type

started implementation of hover and cruise distance

corrected typos

added logic

prevent survey from crasing

added checks for vtol

rearrange logic

added primitive check for landing

rearranged checks

new arrangement

added logic for transition

fix for small bugs

add check for mission speed larger than 0

remove already existinh check

reduce code a bit

clean up