This reverts commit d7f046dd.

# Conflicts:
#	source/RobotAPI/gui-plugins/SkillManagerPlugin/SkillManagerMonitorWidgetController.cpp

- add QuaternionWidget
- remove old modal code
- remove Copy and clone of AronTreeWidgetItem
- add recognition of duplicate dict keys
- add countermeasure to tabbing into unchangeable key fields
- make aronType const in AronTreeWidget
- flag tuple code as untested, since aron is currently broken there
- fix weird std::locals setting in AronTreeWidgetSetter.cpp, which causes floating numbers to print as 12,345 with std::to_string()
- add usage of std::launder to make reinterpret_cast more save within the usage of NDArray

- static variable gone
- replaced by pointer for each element in hierarchy. (Imagine two persistent trees, total chaos otherwise)
- raw matrix data has column wise sorting. Fix reading and writing code.
- QLineEdit now focuses start of line after setText.