Add support for sending media within threads.

This patch add the `threadRootEventID` as a parameter to media sending functions and forwards the timeline thread root between various application states to the place where its needed.
The 2 missing items are Locations and Polls which currently don't have any support on the Rust side for being sent within threads. That will come in a separate PR.

ElementX/Sources/Screens/RoomScreen/ComposerToolbar/ComposerToolbarModels.swift

@@ -80,6 +80,8 @@ struct ComposerToolbarViewState: BindableState {
     
     var keyCommands: [WysiwygKeyCommand] = []
     
+    var isInThread: Bool
+    
     var bindings: ComposerToolbarViewStateBindings
 
     var isUploading: Bool {

ElementX/Sources/Screens/RoomScreen/ComposerToolbar/ComposerToolbarViewModel.swift

@@ -46,6 +46,7 @@ final class ComposerToolbarViewModel: ComposerToolbarViewModelType, ComposerTool
 
     init(initialText: String? = nil,
          roomProxy: JoinedRoomProxyProtocol,
+         isInThread: Bool = false,
          wysiwygViewModel: WysiwygComposerViewModel,
          completionSuggestionService: CompletionSuggestionServiceProtocol,
          mediaProvider: MediaProviderProtocol,
@@ -68,6 +69,7 @@ final class ComposerToolbarViewModel: ComposerToolbarViewModelType, ComposerTool
                                                               audioRecorderState: .init(),
                                                               isRoomEncrypted: roomProxy.infoPublisher.value.isEncrypted,
                                                               isLocationSharingEnabled: appSettings.mapTilerConfiguration.isEnabled,
+                                                              isInThread: isInThread,
                                                               bindings: .init()),
                    mediaProvider: mediaProvider)
         

ElementX/Sources/Screens/RoomScreen/ComposerToolbar/View/RoomAttachmentPicker.swift

@@ -40,14 +40,16 @@ struct RoomAttachmentPicker: View {
             }
             .accessibilityIdentifier(A11yIdentifiers.roomScreen.attachmentPickerTextFormatting)
             
-            Button {
-                context.send(viewAction: .attach(.poll))
-            } label: {
-                Label(L10n.screenRoomAttachmentSourcePoll, icon: \.polls)
+            if !context.viewState.isInThread {
+                Button {
+                    context.send(viewAction: .attach(.poll))
+                } label: {
+                    Label(L10n.screenRoomAttachmentSourcePoll, icon: \.polls)
+                }
+                .accessibilityIdentifier(A11yIdentifiers.roomScreen.attachmentPickerPoll)
             }
-            .accessibilityIdentifier(A11yIdentifiers.roomScreen.attachmentPickerPoll)
             
-            if context.viewState.isLocationSharingEnabled {
+            if !context.viewState.isInThread, context.viewState.isLocationSharingEnabled {
                 Button {
                     context.send(viewAction: .attach(.location))
                 } label: {

ElementX/Sources/Screens/RoomScreen/RoomScreenCoordinator.swift

@@ -98,6 +98,7 @@ final class RoomScreenCoordinator: CoordinatorProtocol {
                                                         parserStyle: .elementX)
         let composerViewModel = ComposerToolbarViewModel(initialText: parameters.sharedText,
                                                          roomProxy: parameters.roomProxy,
+                                                         isInThread: false,
                                                          wysiwygViewModel: wysiwygViewModel,
                                                          completionSuggestionService: parameters.completionSuggestionService,
                                                          mediaProvider: parameters.mediaProvider,