`FilterBeforeBox` and `IntrinsicBox`

This MR moves two GroupBoxes from Control into their own widgets:

• filterBefore
• intrinsic

TODO:

• MERGE !245 (merged)
• Add tests for calibration; since only applying an existing calibration is tested with the regression tests, not creating a new one...
• Manual testing of GUI

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Note:

• Changed Petrack-Object to take version via constructor, such that mDefaultSettings has a valid version.
• Moved min/max values to UI, since they have only been used there
• Save distortionCoeffs as float, since they have only been used with that precision (camMat is sometimes used with double precision, so it is saved as double)
  • Should I save distortionCoeffs as double instead and convert to float for using it (to not fail regression tests)?