(ARCalibration): live reprojection for intrinsic calibration

What does this MR do?

• Compute the reprojection error for each new frame following the calibration.
• Display the reprojected points and the reprojection error.
• Display the detected points.
• Add the ability to undistort the video images once the calibration is computed.
• Modify SSolvePnP to always update the camera parameters.

How to test it?

• Run ARCalibration.
• Launch the calibration activity.
• Configure the chessboard settings.
• Connect to a camera.
• See if the chessboard points are detected.
• Do a calibration (or load it if you already have one).
• See the reprojected points.

Some results

Associated Issues/Merge Requests

• Issues

  • Fixes #343 (closed)

• Merge requests

  • depends on !239 (merged)