MediaCategoryViewController: Reset collection content inset on edit

Fix regression from 19dba7fd23dd30f4dd2a136f2588b9efd2e9b232

Sources/MediaCategories/MediaCategoryViewController.swift

@@ -295,6 +295,10 @@ class MediaCategoryViewController: UICollectionViewController, UISearchBarDelega
         if isEditing {
             tabBarController?.editToolBar()?.delegate = editController
             tabBarController?.displayEditToolbar(with: model)
+            UIView.animate(withDuration: 0.2) {
+                [weak self] in
+                self?.collectionView.contentInset = .zero
+            }
         } else {
             tabBarController?.hideEditToolbar()
         }