Merge branch 'develop' into 'master'

.gitlab-ci.yml

CMakeLists.txt

src/CMakeLists.txt

src/data/nodes/changed_max_points.cpp

src/data/nodes/dynexite_exam.cpp

src/data/nodes/dynexite_exam.hpp

src/file_io/d2r_parser.hpp

src/util/defaults.hpp

src/util/strings.hpp

src/view/boundary_window/boundary_window.cpp

src/view/gui/custom_double_spin_box.cpp

src/view/gui/custom_double_spin_box.hpp

src/view/input_window/load_file_view.cpp

src/view/main_window/export_rwthonline.cpp

src/view/main_window/export_rwthonline.hpp

src/view/main_window/grade_tab.hpp

src/view/main_window/main_window.cpp

src/view/main_window/main_window.hpp

src/view/main_window/min_max_point_screws.cpp

src/view/main_window/point_histogram.hpp