Fixed KeyCollection loading Bug, Rename TriggerDisplayable

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

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

...all/src/de/tobias/playpad/trigger/TriggerDisplayable.java

...iewcontroller/option/pad/TriggerPadTabViewController.java

...roller/option/pad/trigger/TriggerPointViewController.java

...llCore/src/de/tobias/playpad/settings/GlobalSettings.java

PlayWallCore/src/de/tobias/playpad/settings/keys/Key.java

...re/src/de/tobias/playpad/settings/keys/KeyCollection.java