Add extra tab for trajectory tests

Adds an extra tab for the included trajectory tests. The desired tests can be enabled via checkboxes, and the results are displayed in a table. A click on a row jumps to the corresponding frame and shows only the pedestrian for whom the test failed.

Implementation details:

• Make checkPlausibility a free function
• Create extra QWidget for the content of the new tab (trying not to increase complexity of control more)

Open ToDos:

• button to run the tests
• check boxes to enable/disable tests
• parameters for the tests
• table which shows the results of the tests
• click on an entry of the test should jump to the frame with the issue
• row should contain a resolve button which marks the tests as resolved at deletes it from the table (may reappear if run test is clicked again
• Change error-string (delete part with frame and person-number)

Closes #214 (closed)

Reviewer Checklist

Formatting

• the pre-build checks succeed

General code quality

• naming conventions are met (see .clang-tidy for detailed information)
• no static analyzer warnings in new code parts (e.g., use clang-tidy for checking)

General usability

• old versions of pet-files are still loadable

Only if changes in UI

• new elements are also saved and loaded from pet-file
• check if tab order is still correct
• all new SpinBoxes are promoted
• new keybindings added to Petrack::keyBindings()