Branch StartDM in the RoomMemberDetails screen

appnav/src/main/kotlin/io/element/android/appnav/LoggedInFlowNode.kt

@@ -256,6 +256,10 @@ class LoggedInFlowNode @AssistedInject constructor(
             }
             is NavTarget.Room -> {
                 val callback = object : RoomLoadedFlowNode.Callback {
+                    override fun onOpenRoom(roomId: RoomId) {
+                        backstack.push(NavTarget.Room(roomId))
+                    }
+
                     override fun onForwardedToSingleRoom(roomId: RoomId) {
                         coroutineScope.launch { attachRoom(roomId) }
                     }

appnav/src/main/kotlin/io/element/android/appnav/room/RoomLoadedFlowNode.kt

@@ -74,6 +74,7 @@ class RoomLoadedFlowNode @AssistedInject constructor(
 ), DaggerComponentOwner {
 
     interface Callback : Plugin {
+        fun onOpenRoom(roomId: RoomId)
         fun onForwardedToSingleRoom(roomId: RoomId)
         fun onOpenGlobalNotificationSettings()
     }
@@ -134,6 +135,10 @@ class RoomLoadedFlowNode @AssistedInject constructor(
             override fun onOpenGlobalNotificationSettings() {
                 callbacks.forEach { it.onOpenGlobalNotificationSettings() }
             }
+
+            override fun onOpenRoom(roomId: RoomId) {
+                callbacks.forEach { it.onOpenRoom(roomId) }
+            }
         }
         return roomDetailsEntryPoint.nodeBuilder(this, buildContext)
             .params(RoomDetailsEntryPoint.Params(initialTarget))