- feat: continued porting features from the existing group finding tool.

...c/main/java/unipotsdam/gf/core/management/Management.java

...in/java/unipotsdam/gf/core/management/ManagementImpl.java

...ava/unipotsdam/gf/core/management/project/ProjectDAO.java

...va/unipotsdam/gf/core/management/project/ProjectView.java

gemeinsamforschen/src/main/webapp/core/showProjects.js

gemeinsamforschen/src/main/webapp/course/js/showProjects.js

...rschen/src/main/webapp/groupfinding/enter-preferences.jsp

...chen/src/main/webapp/groupfinding/js/createPreferences.js

...insamforschen/src/main/webapp/management/join-project.jsp

...forschen/src/main/webapp/management/join-project.jsp.orig

...samforschen/src/main/webapp/management/js/join-project.js

gemeinsamforschen/src/main/webapp/management/js/overview.js