[iOS] Create public space #143

- Update after design review

RiotSwiftUI/Modules/Spaces/SpaceCreation/SpaceCreationSettings/ViewModel/SpaceCreationSettingsViewModel.swift

@@ -79,6 +79,7 @@ class SpaceCreationSettingsViewModel: SpaceCreationSettingsViewModelType, SpaceC
             addressMessage: addressMessage(with: validationStatus),
             isAddressValid: isAddressValid(with: validationStatus),
             avatar: AvatarInput(mxContentUri: nil, matrixItemId: "", displayName: nil),
+            avatarImage: creationParameters.userSelectedAvatar,
             bindings: bindings)
     }
     
@@ -93,6 +94,8 @@ class SpaceCreationSettingsViewModel: SpaceCreationSettingsViewModelType, SpaceC
         switch viewAction {
         case .done:
             done()
+        case .back:
+            back()
         case .cancel:
             cancel()
         case .pickImage(let sourceRect):
@@ -151,6 +154,10 @@ class SpaceCreationSettingsViewModel: SpaceCreationSettingsViewModelType, SpaceC
         callback?(.cancel)
     }
     
+    private func back() {
+        callback?(.back)
+    }
+    
     private func pickImage(from sourceRect: CGRect) {
         callback?(.pickImage(sourceRect))
     }