- 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

- Alt + holding left mouse-button enables to move the point under the cursor by dragging it with the mouse
- Point isn't moved anymore as soon as either the mouse button or alt are not pressed anymore
- Added documentation in "Key Bindings" Window for this and for !188 (Jumping to frame of trackpoint under cursor; Alt + dbl-Click)

Add AutoSave mechanism. The manual changes to the trajectories are counted. After 10 changes, the trajectories are exported to a hidden file. This hidden file can be loaded in the case of an crash of PeTrack. The project file is saved time based.