Minor UI tweaks

Signal/src/Models/MessageActions.swift

@@ -33,7 +33,7 @@ struct MessageActionBuilder {
     }
     
     static func copyPublicKey(conversationViewItem: ConversationViewItem, delegate: MessageActionsDelegate) -> MenuAction {
-        return MenuAction(image: #imageLiteral(resourceName: "Key"),
+        return MenuAction(image: #imageLiteral(resourceName: "Key").scaled(to: CGSize(width: 24, height: 24)),
                           title: NSLocalizedString("Copy Session ID", comment: ""),
                           subtitle: nil,
                           block: { [weak delegate] _ in delegate?.copyPublicKey(for: conversationViewItem) }

Signal/src/ViewControllers/MediaTileViewController.swift

@@ -874,7 +874,7 @@ private class MediaGalleryStaticHeader: UICollectionViewCell {
         label.textColor = Theme.darkThemePrimaryColor
         label.textAlignment = .center
         label.numberOfLines = 0
-        label.autoPinEdgesToSuperviewMargins()
+        label.autoPinEdgesToSuperviewMargins(with: UIEdgeInsets(top: 0, leading: Values.largeSpacing, bottom: 0, trailing: Values.largeSpacing))
     }
 
     @available(*, unavailable, message: "Unimplemented")