Preselect current page in trigger settings

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

...ava/de/tobias/playpad/trigger/CartTriggerItemFactory.java

...a/de/tobias/playpad/trigger/VolumeTriggerItemFactory.java

.../viewcontroller/option/pad/PadSettingsViewController.java

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

...troller/option/pad/trigger/CartTriggerViewController.java

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

...oller/option/pad/trigger/VolumeTriggerViewController.java

...ain/java/de/tobias/playpad/tigger/TriggerItemFactory.java

.../java/de/tobias/playpad/view/main/ProjectPreviewView.java