Use dismissable text views where cramped on shorter devices

// FREEBIE

Signal/src/ViewControllers/ProfileViewController.m

@@ -117,7 +117,12 @@ NSString *const kProfileView_LastPresentedDate = @"kProfileView_LastPresentedDat
     [nameLabel autoPinLeadingToSuperviewMargin];
     [nameLabel autoPinHeightToSuperviewWithMargin:5.f];
 
-    UITextField *nameTextField = [UITextField new];
+    UITextField *nameTextField;
+    if (UIDevice.currentDevice.isShorterThanIPhone5) {
+        nameTextField = [DismissableTextField new];
+    } else {
+        nameTextField = [UITextField new];
+    }
     _nameTextField = nameTextField;
     nameTextField.font = [UIFont ows_mediumFontWithSize:18.f];
     nameTextField.textColor = [UIColor ows_materialBlueColor];

Signal/src/ViewControllers/Registration/CodeVerificationViewController.m

@@ -147,7 +147,12 @@ NS_ASSUME_NONNULL_BEGIN
 
     const CGFloat kHMargin = 36;
 
-    _challengeTextField = [UITextField new];
+    if (UIDevice.currentDevice.isShorterThanIPhone5) {
+        _challengeTextField = [DismissableTextField new];
+    } else {
+        _challengeTextField = [UITextField new];
+    }
+
     _challengeTextField.textColor = [UIColor blackColor];
     _challengeTextField.placeholder = NSLocalizedString(@"VERIFICATION_CHALLENGE_DEFAULT_TEXT",
         @"Text field placeholder for SMS verification code during registration");

Signal/src/views/PinEntryView.m

@@ -59,7 +59,12 @@ NS_ASSUME_NONNULL_BEGIN
 
 - (void)createPinTextfield
 {
-    self.pinTextfield = [UITextField new];
+    if (UIDevice.currentDevice.isShorterThanIPhone5) {
+        self.pinTextfield = [DismissableTextField new];
+    } else {
+        self.pinTextfield = [UITextField new];
+    }
+
     self.pinTextfield.textColor = [UIColor blackColor];
     self.pinTextfield.font = [UIFont ows_mediumFontWithSize:ScaleFromIPhone5To7Plus(30.f, 36.f)];
     self.pinTextfield.textAlignment = NSTextAlignmentCenter;