Reflow flight mode layout even when joystick control is enabled

Mission Item raw/friendly edit support, plus more [merge after Stable 2.8]

Auto connect support [merge after Stable 2.8]

- Pervasive change to automatically connect to known board types
- Lots of additional changes along with this:
- More exposure of objects/properties to Qml
- Much restructuring in LinkManager and LinkManager clients

- Pervasive change to automatically connect to known board types
- Lots of additional changes along with this:
- More exposure of objects/properties to Qml
- Much restructuring in LinkManager and LinkManager clients

travis-ci ubuntu trusty

Also friendly editor for MAV_CMD_NAV_ROI and MAV_CMD_DO_SET_SERVO

android fix gstreamer check

travis-ci fix ruby mime-types 

This reverts commit aaf746d1.

This reverts commit 50c07f7d.

Joystick fix: Enable joystick right after calibration & do not send anything to vehicle if not configured

Joystick: Fix calibration and default use: Do not send anything to vehicle until enabled. Enable after calibration by default.

Remove warning about no mavlink dialect

Linux shell script run command

New system message dialog.