Resolve "Make sure that every slider also gets a spinbox"

Adding SpinBoxes for slider/scrollbars in the gui. They have the same default values and are syncronized to the corresponding slider.

If you find a slider that I missed, leave a comment.

More specifically added to: Recognition:

• markerBrightness
• recoColorZ
• recoGreyLevel
• recoSymbolSize
• mapX
• mapY
• mapH
• mapW

Tracking:

• trackRegionScale
• trackRegionLevels
• trackErrorExponent

Closes #329 (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()