Generate a warning if unable to load live calibration from pcap file
Generate a warning if unable to load live calibration from pcap file

Merge branch 'bugfix/WarningCantLoadCalibrationFromFile' into 'master'

Display a warning when VeloView doesn't manage to compute the 
calibration when opening a *.pcap file with Live Calibration.

See internal merge request 96
Kitware/VeloView,Kitware/VeloView,Kitware/VeloView,Kitware/VeloView,Kitware/VeloView