Fix Opening Maximized Media

Make sure the Image and Video Components can correctly get the index for opening the Maximize Media component.

src/timeline/MessageComponentChooser.qml

@@ -17,6 +17,11 @@ DelegateChooser {
      */
     required property NeoChatRoom room
 
+    /**
+     * @brief The index of the delegate in the model.
+     */
+    required property var index
+
     /**
      * @brief The ActionsHandler object to use.
      *
@@ -65,6 +70,7 @@ DelegateChooser {
         roleValue: MessageComponentType.Image
         delegate: ImageComponent {
             room: root.room
+            index: root.index
             timeline: root.timeline
             maxContentWidth: root.maxContentWidth
         }
@@ -74,6 +80,7 @@ DelegateChooser {
         roleValue: MessageComponentType.Video
         delegate: VideoComponent {
             room: root.room
+            index: root.index
             timeline: root.timeline
             maxContentWidth: root.maxContentWidth
         }