Refactor playpad interface

PlayWall/src/main/java/de/tobias/playpad/PlayPadImpl.java

PlayWall/src/main/java/de/tobias/playpad/PlayPadMain.java

...c/main/java/de/tobias/playpad/RegistryCollectionImpl.java

...in/java/de/tobias/playpad/design/ModernStyleableImpl.java

...ypad/layout/desktop/DesktopMenuToolbarViewController.java

...ias/playpad/layout/desktop/DesktopPageEditButtonView.java

...as/playpad/layout/desktop/pad/DesktopPadDragListener.java

.../de/tobias/playpad/layout/desktop/pad/DesktopPadView.java

.../playpad/layout/desktop/pad/DesktopPadViewController.java

.../playpad/layout/touch/TouchMenuToolbarViewController.java

...java/de/tobias/playpad/layout/touch/pad/TouchPadView.java

...main/java/de/tobias/playpad/pad/content/AudioContent.java

.../de/tobias/playpad/view/MapperListViewControllerImpl.java

.../de/tobias/playpad/viewcontroller/AuthViewController.java

...n/java/de/tobias/playpad/viewcontroller/LaunchDialog.java

.../viewcontroller/actions/CartActionTypeViewController.java

.../de/tobias/playpad/viewcontroller/dialog/AboutDialog.java

...pad/viewcontroller/dialog/ModernPluginViewController.java

...tobias/playpad/viewcontroller/dialog/PathMatchDialog.java

...aypad/viewcontroller/dialog/PlayoutLogViewController.java