[CB-2631] Fix crash when bad url given to FT.upload
CB-1452 Media position incorrect after being set beyond duration

- add protection when setting of media past duration
- reset position when player successfully completes
CB-2436 Wrong splashscreen is displayed when UILaunchImageFile is set

-correct splash shown for iPhone and iPad (all models)
[CB-2384] Add new iOS Project Setting to suppress the form accessory bar above the keyboard
Retain cycle fix