Restore pull-to-refresh in the "new contact thread" view.

// FREEBIE

Signal/src/ViewControllers/NewContactThreadViewController.m

@@ -113,9 +113,25 @@ NS_ASSUME_NONNULL_BEGIN
     [self.noSignalContactsView autoPinEdgeToSuperviewEdge:ALEdgeTop];
     [self.noSignalContactsView autoPinToBottomLayoutGuideOfViewController:self withInset:0];
 
+    UIRefreshControl *pullToRefreshView = [UIRefreshControl new];
+    pullToRefreshView.tintColor = [UIColor grayColor];
+    [pullToRefreshView addTarget:self
+                          action:@selector(pullToRefreshPerformed:)
+                forControlEvents:UIControlEventValueChanged];
+    [self.tableViewController.tableView insertSubview:pullToRefreshView atIndex:0];
+
     [self updateTableContents];
 }
 
+- (void)pullToRefreshPerformed:(UIRefreshControl *)refreshControl
+{
+    OWSAssert([NSThread isMainThread]);
+
+    [self.contactsViewHelper.contactsManager requestSystemContactsOnce];
+
+    [refreshControl endRefreshing];
+}
+
 - (void)showContactsPermissionReminder:(BOOL)isVisible
 {
     _hideContactsPermissionReminderViewConstraint.active = !isVisible;
@@ -789,6 +805,18 @@ NS_ASSUME_NONNULL_BEGIN
     }
 }
 
+#pragma mark - Logging
+
++ (NSString *)tag
+{
+    return [NSString stringWithFormat:@"[%@]", self.class];
+}
+
+- (NSString *)tag
+{
+    return self.class.tag;
+}
+
 @end
 
 NS_ASSUME_NONNULL_END