application pkg: Evaluate TODOs in code, either removing or filing issues as appropriate

TODOs found in application infrastructure:

 kevin 12930 8f8ba3c2d012 javafx-ui-common/src/com/sun/javafx/application/LauncherImpl.java:20: // TODO: what about preloader?
   kevin 12051 a61e4780442b javafx-ui-common/src/com/sun/javafx/application/LauncherImpl.java:50: // TODO: consider just doing this on the calling thread
   kevin 13768 1604250b9024 javafx-ui-common/src/com/sun/javafx/application/LauncherImpl.java:174: // TODO: handle exit call from preloader
  kevin 12930 8f8ba3c2d012 javafx-ui-common/src/com/sun/javafx/application/PlatformImpl.java:41: // TODO: if we ever support re-launching an application and/or
kevin 11813 af75506c9aef javafx-ui-common/src/javafx/application/Platform.java:34: // TODO: Add the following if we decide to expose it publicly
kevin 12454 ba20638a1440 javafx-ui-common/src/javafx/application/Preloader.java:173: // //TODO: not used for now pending completion of JRE work
kevin 12454 ba20638a1440 javafx-ui-common/src/javafx/application/Preloader.java:274: // TODO: consider exposing details in the future
kevin 12454 ba20638a1440 javafx-ui-common/src/javafx/application/Preloader.java:392: // //TODO: implementation pending JRE work