Add the same unsaved changes alerts that Android has. (#4803)

* Add an alert to Discard or Save when there are unsaved changes on the RoomDetailsEditScreen.

* Add an alert to Discard or Save when there are unsaved changes on the UserDetailsEditScreen.

* Add an alert to Discard or Save when there are unsaved changes on the SecurityAndPrivacyScreen.

* Update strings.

ElementX/Sources/FlowCoordinators/RoomFlowCoordinator.swift

@@ -1355,6 +1355,8 @@ class RoomFlowCoordinator: FlowCoordinatorProtocol {
             switch action {
             case .displayEditAddressScreen:
                 presentEditAddressScreen()
+            case .dismiss:
+                navigationStackCoordinator.pop()
             }
         }
         .store(in: &cancellables)

ElementX/Sources/FlowCoordinators/SettingsFlowCoordinator.swift

@@ -155,6 +155,14 @@ class SettingsFlowCoordinator: FlowCoordinatorProtocol {
                                                                              navigationStackCoordinator: navigationStackCoordinator,
                                                                              userIndicatorController: flowParameters.userIndicatorController,
                                                                              appSettings: flowParameters.appSettings))
+        coordinator.actions
+            .sink { [weak self] action in
+                switch action {
+                case .dismiss:
+                    self?.navigationStackCoordinator.pop()
+                }
+            }
+            .store(in: &cancellables)
         
         navigationStackCoordinator.push(coordinator)
     }

ElementX/Sources/FlowCoordinators/SpaceSettingsFlowCoordinator.swift

@@ -256,6 +256,8 @@ final class SpaceSettingsFlowCoordinator: FlowCoordinatorProtocol {
             switch action {
             case .displayEditAddressScreen:
                 self.stateMachine.tryEvent(.presentEditAddress)
+            case .dismiss:
+                navigationStackCoordinator.pop()
             }
         }
         .store(in: &cancellables)