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/RoomChangeRolesScreen/View/RoomChangeRolesScreen.swift

@@ -61,15 +61,6 @@ struct RoomChangeRolesScreen: View {
         }
     }
     
-    private var noResultsContent: some View {
-        Text(L10n.commonNoResults)
-            .font(.compound.bodyLG)
-            .foregroundColor(.compound.textSecondary)
-            .frame(maxWidth: .infinity)
-            .listRowBackground(Color.clear)
-            .accessibilityIdentifier(A11yIdentifiers.startChatScreen.searchNoResults)
-    }
-    
     @ViewBuilder
     private var membersSection: some View {
         if !context.viewState.visibleMembers.isEmpty {
@@ -123,6 +114,14 @@ struct RoomChangeRolesScreen: View {
             }
             .disabled(!context.viewState.hasChanges)
         }
+        
+        if context.viewState.hasChanges {
+            ToolbarItem(placement: .cancellationAction) {
+                Button(L10n.actionCancel) {
+                    context.send(viewAction: .cancel)
+                }
+            }
+        }
     }
 }