Navigate to UIFontPickerViewController instead of presenting it

app/AboutAppearanceViewController.m

@@ -16,6 +16,8 @@
 
 @interface AboutAppearanceViewController ()
 
+@property UIFontPickerViewController *fontPicker API_AVAILABLE(ios(13));
+
 @end
 
 @implementation AboutAppearanceViewController
@@ -29,6 +31,20 @@ - (void)viewDidLoad {
     }];
 }
 
+- (void)viewDidAppear:(BOOL)animated {
+    if (@available(iOS 13, *)) {
+        // Initialize the font picker ASAP, as it takes about a quarter second to initialize (XPC crap) and appears invisible until then.
+        // Re-initialize it after navigating away from it, to reset the table view highlight.
+        UIFontPickerViewControllerConfiguration *config = [UIFontPickerViewControllerConfiguration new];
+        config.filteredTraits = UIFontDescriptorTraitMonoSpace;
+        self.fontPicker = [[UIFontPickerViewController alloc] initWithConfiguration:config];
+        // Prevent the font picker from resizing the popup when it appears
+        self.fontPicker.preferredContentSize = CGSizeZero;
+        self.fontPicker.navigationItem.title = @"Font";
+        self.fontPicker.delegate = self;
+    }
+}
+
 #pragma mark - Table view data source
 
 enum {
@@ -123,13 +139,9 @@ - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath
     }
 }
 
-- (IBAction)selectFont:(id)sender {
+- (void)selectFont:(id)sender {
     if (@available(iOS 13, *)) {
-        UIFontPickerViewControllerConfiguration *config = [UIFontPickerViewControllerConfiguration new];
-        config.filteredTraits = UIFontDescriptorTraitMonoSpace;
-        UIFontPickerViewController *fontPicker = [[UIFontPickerViewController alloc] initWithConfiguration:config];
-        fontPicker.delegate = self;
-        [self presentViewController:fontPicker animated:YES completion:nil];
+        [self.navigationController pushViewController:self.fontPicker animated:YES];
         return;
     }
 
@@ -139,6 +151,7 @@ - (IBAction)selectFont:(id)sender {
 
 - (void)fontPickerViewControllerDidPickFont:(UIFontPickerViewController *)viewController API_AVAILABLE(ios(13.0)) {
     UserPreferences.shared.fontFamily = viewController.selectedFontDescriptor.fontAttributes[UIFontDescriptorFamilyAttribute];
+    [self.navigationController popToViewController:self animated:YES];
 }
 
 - (IBAction)fontSizeChanged:(UIStepper *)sender {