Form session fix

Fix it so when you post a form that has errors and us `return Redirect::to('/')->withErrors( $validation )->withInput()`, the field will show the data entered by the user, which has an error and not default to the modal data or the default value.

Form Helper has the function `setSessionStore` but it's never used.

Also it has a check in place to check for `hasOldInput` from the session.