3. Double spinbox for scientific notation
http://www.matthiaspospiech.de/blog/2009/01/03/qt-spinbox-widget-with-scientific-notation/ https://jdreaver.com/posts/2014-07-28-scientific-notation-spin-box-pyside.html https://github.com/pospiech/code/tree/master/libdev/qt/qtwidgets https://github.com/LeeSaferite/OpenPilot/tree/master/ground/openpilotgcs/src/libs/qscispinbox https://code.ornl.gov/mantidproject/mantid/blob/0cc17ac41921a38c3f67733fc42b3825739b7180/MantidQt/API/inc/MantidQtAPI/QScienceSpinBox.h https://gitlab.sandbox64.at/xeniter/taulabs/commit/5b9a50127f4252d0dd14245e50d75f4499e2fdd9