Hide the header visual effects.

Author: ScoutHarris

WordPress/Classes/ViewRelated/Feature Introduction/FeatureIntroductionViewController.swift

@@ -85,6 +85,7 @@ private extension FeatureIntroductionViewController {
     func configureView() {
         navigationItem.rightBarButtonItem = CollapsableHeaderViewController.closeButton(target: self, action: #selector(closeButtonTapped))
         scrollView.addSubview(contentView)
+        hideHeaderVisualEffects()
 
         NSLayoutConstraint.activate([
             contentView.topAnchor.constraint(equalTo: scrollView.topAnchor),

WordPress/Classes/ViewRelated/Gutenberg/Collapsable Header/CollapsableHeaderViewController.swift

@@ -515,6 +515,13 @@ class CollapsableHeaderViewController: UIViewController, NoResultsViewHost {
         selectedStateButtonsContainer.insertArrangedSubview(primaryActionButton, at: 0)
     }
 
+    /// A public interface to hide the header blur.
+    func hideHeaderVisualEffects() {
+        visualEffects.forEach { (visualEffect) in
+            visualEffect.isHidden = true
+        }
+    }
+    
     /// In scenarios where the content offset before content changes doesn't align with the available space after the content changes then the offset can be lost. In
     /// order to preserve the header's collpased state we cache the offset and attempt to reapply it if needed.
     private var stashedOffset: CGPoint? = nil