is there a jailbreak tweak/app for this. for example if I am typing a sentance: I wish I was a wondderful tree. you noticed I misspelled wondderful, if I want to go back to change it I cant go to the specific letter "d" and delete it. I have to go to the end of the word and push backspace a few times. Is there an app where I will be able to select a specific letter of my choice when I want to adjust something.