Hide keyboard when scrolling the contacts list in new/edit group view.

// FREEBIE

Signal/src/view controllers/NewGroupViewController.m

@@ -403,4 +403,10 @@ static NSString *const kUnwindToMessagesViewSegue = @"UnwindToMessagesViewSegue"
     return NO;
 }
 
+#pragma mark - UIScrollViewDelegate
+
+- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
+    [self.nameGroupTextField resignFirstResponder];
+}
+
 @end