Improve: KeyCollection, ProfileReference, ProjectReference and Clean Up

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

PlayWall/src/de/tobias/playpad/VersionUpdater.java

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

...ll/src/de/tobias/playpad/viewcontroller/LaunchDialog.java

...rc/de/tobias/playpad/viewcontroller/cell/ProjectCell.java

...playpad/viewcontroller/dialog/DuplicateProfileDialog.java

...playpad/viewcontroller/dialog/DuplicateProjectDialog.java

...obias/playpad/viewcontroller/dialog/NewProfileDialog.java

...obias/playpad/viewcontroller/dialog/NewProjectDialog.java

...as/playpad/viewcontroller/dialog/ProfileChooseDialog.java

.../playpad/viewcontroller/dialog/ProfileViewController.java

...s/playpad/viewcontroller/dialog/ProjectManagerDialog.java

...e/src/de/tobias/playpad/profile/ref/ProfileReference.java

...c/de/tobias/playpad/profile/ref/ProfileReferenceList.java

...obias/playpad/profile/ref/ProfileReferenceSerializer.java

.../src/de/tobias/playpad/profile/ref/ProfileReferences.java

...llCore/src/de/tobias/playpad/project/ProjectExporter.java

...llCore/src/de/tobias/playpad/project/ProjectImporter.java

...e/src/de/tobias/playpad/project/ref/ProjectReference.java

...obias/playpad/project/ref/ProjectReferenceSerializer.java