Final changes for Room Moderation (#2576)

* Add confirmation that the user would like to discard unsaved changes.

* Update string on permissions screen.

* Fix UI tests and update snapshots.

* Fix integration tests.

* Run periphery for Moderation feature.

ElementX/Sources/Screens/RoomChangePermissionsScreen/View/RoomChangePermissionsScreen.swift

@@ -35,6 +35,7 @@ struct RoomChangePermissionsScreen: View {
         .compoundList()
         .navigationTitle(context.viewState.title)
         .navigationBarTitleDisplayMode(.inline)
+        .navigationBarBackButtonHidden(context.viewState.hasChanges)
         .toolbar { toolbar }
         .alert(item: $context.alertInfo)
     }
@@ -47,6 +48,14 @@ struct RoomChangePermissionsScreen: View {
             }
             .disabled(!context.viewState.hasChanges)
         }
+        
+        if context.viewState.hasChanges {
+            ToolbarItem(placement: .cancellationAction) {
+                Button(L10n.actionCancel) {
+                    context.send(viewAction: .cancel)
+                }
+            }
+        }
     }
 }