Fix constraint issues

Signal/src/ViewControllers/MediaPageViewController.swift

@@ -181,8 +181,8 @@ class MediaPageViewController: UIPageViewController, UIPageViewControllerDataSou
 
         self.view.addSubview(bottomContainer)
         bottomContainer.autoPinWidthToSuperview()
-        bottomContainer.autoPinEdge(toSuperviewSafeArea: .bottom)
-        footerBar.autoPinEdge(toSuperviewSafeArea: .bottom)
+        bottomContainer.autoPinEdge(.bottom, to: .bottom, of: view)
+        footerBar.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor).isActive = true
         footerBar.autoSetDimension(.height, toSize: 44)
 
         updateTitle()

Signal/src/ViewControllers/MediaTileViewController.swift

@@ -533,7 +533,7 @@ public class MediaTileViewController: UICollectionViewController, MediaGalleryDa
         // show toolbar
         UIView.animate(withDuration: 0.1, delay: 0, options: .curveEaseInOut, animations: {
             NSLayoutConstraint.deactivate([self.footerBarBottomConstraint])
-            self.footerBarBottomConstraint = self.footerBar.autoPinEdge(.bottom, to: .bottom, of: self.view)
+            self.footerBarBottomConstraint = self.footerBar.autoPinEdge(toSuperviewSafeArea: .bottom)
 
             self.footerBar.superview?.layoutIfNeeded()