v3.1.2

• 🐛 Quizzes: Fix Bug where Hints and Explanations where not shown. #456 @thilo-behnke
• 🐛 Fix Bug where the Problem Statement was now shown on Exercise Overview page. #457 @thilo-behnke
• 🚀 Automatically submit Text and Modeling Assessments. #449 @SiggZ @jpbernius
• 🐛 Short Answer Quiz: Fix Bug with creation of spots using drag-and-drop in non-Chrome browsers. #458 @fde312
• 🐛 Statistics: Fix quiz statistics footer on mobile devices. #447 @lovaiible
• 🌐 Fix Translation Key for "General Feedback" on Text Exercises. @jpbernius