Merge branch 'master' of https://github.com/mavlink/qgroundcontrol

* 'master' of https://github.com/mavlink/qgroundcontrol: (37 commits)
  Update ISSUE_TEMPLATE.md
  Update ISSUE_TEMPLATE.md
  Create ISSUE_TEMPLATE.md
  Revert "Remove FileManager unit test"
  Revert "Temp removal of Onboard File"
  FileManager: fix upload complete
  QGCUASFileView.cc: fix upload complete
  Flight display: Fixed TypeErrors on startup without gstream installed
  Fix timeout logic
  10 sec timeout on vehicle
  Stack callsign below altitude
  Flight display: Create property variable
  Flight display: Remove video record button when gstreamer is not installed
  Add missing lib
  Flight display: Add callsign to transponders
  Add missing lib
  Better display of vehicle indicators for multi-vehicle
  Add support for ADSB vehicle display
  travis-ci fix indentation
  travis-ci fix google play deploy and quiet wget
  ...