Don't need to take modifiers as parameter to screenGroup. Fix example theming.

RiotSwiftUI/Modules/Template/TemplateAdvancedRoomsExample/TemplateRoomChat/View/TemplateRoomChat.swift

@@ -54,6 +54,7 @@ struct TemplateRoomChat: View {
             .padding()
             
         }
+        .background(theme.colors.background)
         .navigationTitle(viewModel.viewState.roomName ?? "Chat")
         .toolbar {
             ToolbarItem(placement: .primaryAction) {
@@ -66,6 +67,7 @@ struct TemplateRoomChat: View {
     private var roomContent: some View {
         if case .notInitialized = viewModel.viewState.roomInitializationStatus {
             ProgressView()
+                .progressViewStyle(CircularProgressViewStyle(tint: theme.colors.primaryContent))
                 .accessibility(identifier: "loadingProgress")
         } else if case .failedToInitialize = viewModel.viewState.roomInitializationStatus {
             Text("Sorry, We failed to load the room.")

RiotSwiftUI/Modules/Template/TemplateAdvancedRoomsExample/TemplateRoomChat/View/TemplateRoomChatBubbleMessage.swift

@@ -41,7 +41,8 @@ struct TemplateRoomChatBubbleMessage: View {
 
 @available(iOS 14.0, *)
 struct TemplateRoomChatBubbleMessage_Previews: PreviewProvider {
+    static let message = TemplateRoomChatMessageTextContent(body: "Hello")
     static var previews: some View {
-        EmptyView()
+        TemplateRoomChatBubbleMessage(messageContent: message)
     }
 }

RiotSwiftUI/Modules/Template/TemplateAdvancedRoomsExample/TemplateRoomChat/View/TemplateRoomChatBubbleView.swift

@@ -57,7 +57,13 @@ struct TemplateRoomChatBubbleView_Previews: PreviewProvider {
     static let bubble = TemplateRoomChatBubble(
         id: "111",
         sender: MockTemplateRoomChatService.mockMessages[0].sender,
-        items: []
+        items: [
+            TemplateRoomChatBubbleItem(
+                id: "222",
+                timestamp: Date(),
+                content: .message(.text(TemplateRoomChatMessageTextContent(body: "Hello")))
+            )
+        ]
     )
     static var previews: some View {
         TemplateRoomChatBubbleView(bubble: bubble)