refractoring controller

src/de/brickedleveleditor/game/levels/LevelPackWriter.java

src/de/brickedleveleditor/main/Main.java

src/de/brickedleveleditor/main/_de.properties

.../brickedleveleditor/ui/controller/AbstractController.java

...dleveleditor/ui/controller/LevelPackDialogController.java

src/de/brickedleveleditor/ui/controller/MainController.java

...ckedleveleditor/ui/fxml/level_pack_dialog_controller.fxml

src/de/brickedleveleditor/ui/fxml/main_controller.fxml