- Add test which reads a "default"-pet file and writes it out and then compares them
- Detect differences in reading/writing/overall file format
- fix: ColorMarker read in saturation for value

- Reads in whole intrinsic calibration at once
 -> reads in reprojection error without setting it to NaN later on

- Also add -autoIntrinsic documentation

- Crash due to comparison of cv::Mat with different size
- Append zeros to old model such that it has the same size as the new one

- Move "filter before" GroupBox into own widget
- Move "intrinsic" GroupBox into own widget
- Save intrinsic calibration in struct
- Use said struct as parameter for `CalibFilter`
- Add `setValue`-helper function for loading values into UI respecting min/max
- Move PeTrack-Version from Setter to Constructor of Petrack-object
- Add Unit-Tests

- Fixed boolean expression with inverted button
- Refactored boolean expression for better readability

- updateControlWidget should set new maximum person Nr
- in 3a2030ba wrongfully changed to set current person; revert this change here
- reintroduce updateControlWidget to editTrackPersonComment

- Changes shortcut for jumping to frame

This
 - enables editing the .ui-file without changing control.h; reducing recompile time
 - encapsulates the widgets themselves from everything outside of Control

The custom spinboxes ignore the wheel event, i.e. can not be changed with the mouse wheel.

This MR does not touch sliders. **Sliders can still be changed by scrolling** and spinboxes connected to sliders (i.e. translation of coordinate system) are changed as well, when the slider is changed by scrolling.

* Different minimum number of points
  * coplanar: 4
  * not coplanar: 6
* Check coplanarity, use different thresholds and give according error message

- Ignore empty lines in height file
- Ignore empty lines in markerID file

- Remove Ctrl+E Shortcut for video view export
- Make Shortcut Shift+T usable no matter which tab is selected

- add unit test to make sure, patch is given in future versions

- Preparation on a switch to MSVC on windows
  - Reason: Support for vcpkg, while MinGW is only community supported