Added a settings dialog

...n/java/kieker/diagnosis/common/model/PropertiesModel.java

src/main/java/kieker/diagnosis/dialog/SettingsDialog.java

src/main/java/kieker/diagnosis/mainview/Controller.java

src/main/java/kieker/diagnosis/mainview/View.java

.../java/kieker/diagnosis/subview/aggregatedtraces/View.java

src/main/java/kieker/diagnosis/subview/traces/View.java

...ain/java/kieker/diagnosis/subview/util/NameConverter.java

...java/kieker/diagnosis/subview/util/NameConverterTest.java