Mission protocol robustness rework

HIL fixes

Selected flight mode is controller by firmware. Use selecting flight
mode cannot set the check, or it will be wrong if firmware declines
change.

Log handling

* MavLink/master:
  Warn on unsupported APM version
  APM stack does not support RC cal start/stop
  Harden code for missing params, handle APM special case
  Fix default comp id detection
  PX4 Firmware no longer requires mavlink USB start
  Standard sizing for QGCView::showDialog
  Standard sizing for QGCView::showDialog
  UAS Object: Avoid spamming the console on successful commands
  linux include required libraries
  Show enumStringValue if available
  Use combo box if enums available
  Set proper default mode for VTOL
  Teach mission manager about transition command
  Support camera and VTOL transition commands
  Better light disabled text color
  Add better button highlight color for light theme
  Change selected flight mode color
  Update README.md
  Simplifying Airframe config
  Fixing crash bug.

Conflicts:
	src/ui/MainWindow.cc

Warn on unsupported APM version

Harden code for missing params, handle APM special case

Fix default comp id detection

linux include required libraries

PX4 Firmware no longer requires mavlink USB start

QGCView::showDialog std size

Parameter editor work

Colors

Simplifying Airframe config

Fixing crash bug.

Add comment about not using zip file for downloading

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.