Fixing a bug in the basicScroll, that used to trigger a null ref when using the trigger button after stop the scrolling feature
Making sure that stopping the basic scroll stops the "space" event cancelling
fix a null ref in the prediction text area + removing faulty fixes in the KeyboardTrigger. *more below

The KeyboardTrigger is still bugged, we have no solution yet.
When scrolling and selecting the key used to trigger the selection, we enter in an infinite loop.
We now use the ² button to trigger the scrolling, to avoid the loop in most cases. This is not a valid solution.
WordPredictor.UI.inKeyboardWordPRedictor : adding an unregister on the current keyboard changed to avoid an exception when the predictor is stopped.
BasicScroll & SimpleSkin : needed some un registration in the skin's stop method
Keyboard Editor : the image was added to the keymode instead of the layoutkeymode.
SendString now MEAR for the Simpleskin
compatibility fix between keyboard edition & word predictor (the keyboard can be null, when resetting the changes made on a keyboard)