Gui changes, bug fixes and new functionality

Settings fixed
adapting questionselectionfactory
fixed bug in concrete strategy (questionBytype)

NOG EEN BUG:
java.lang.IndexOutOfBoundsException: Index: 5, Size: 5
at java.util.ArrayList.rangeCheck(Unknown Source)
at java.util.ArrayList.get(Unknown Source)
at
domain.strategy.questionSelection.QuestionsByType.selectQuestions(QuestionsByType.java:56)