Fix Drag n' Drop & Jump to Frame both do not cooperate with "show complete path"

Jumping to a specific frame after clicking on a trajectory and moving a trackpoint of a trajectory both didn't work when show complete path is selected it used framesBefore and framesAfter as the range in which you could jump to / alter the trajectory. This MR fixes this by changing the range to be the whole trajectory when show complete path is selected.

Reviewer Checklist

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
• documentation updated (if applicable)

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()

Closes #522 (closed)