Replaced by code drawn icons.
Removed Files:
resource/de/fhworms/ztt/ox/resources/icons/dialog/close.png
resource/de/fhworms/ztt/ox/resources/icons/dialog/frame.png
resource/de/fhworms/ztt/ox/resources/icons/dialog/iconify.png
resource/de/fhworms/ztt/ox/resources/icons/dialog/maximize.png
resource/de/fhworms/ztt/ox/resources/icons/dialog/minimize.png
