Close keyboard when clicking outside TextField

Added a gestureRecognizer to close the keyboard when clicking outside. For the Personal InfoController, the keyboard is still opened when the user taps on a cell in the table (not necessary in the UITextField from the cell, but anywhere in the cell, just like before). The keyboard is closed when the user clicks outside the table.
For StringController and TextController, the keyboard is closed when clicking outside the UITextField or UITextArea.