Fix timeline layout for non text messages

Change the target of the hover component and delegate layout to timeline container so it applies to all delegates not just text messages.

BUG: 457689

imports/NeoChat/Component/Timeline/TimelineContainer.qml

@@ -58,7 +58,7 @@ QQC2.ItemDelegate {
     // updates the global hover component to point to this delegate, and update its position
     function updateHoverComponent() {
         if (hoverComponent) {
-            hoverComponent.delegate = messageDelegate
+            hoverComponent.delegate = timelineContainer
             hoverComponent.bubble = bubble
             hoverComponent.updateFunction = updateHoverComponent;
             hoverComponent.event = model
@@ -71,7 +71,7 @@ QQC2.ItemDelegate {
         State {
             name: "alignLeft"
             AnchorChanges {
-                target: messageDelegate
+                target: timelineContainer
                 anchors.horizontalCenter: undefined
                 anchors.left: parent ? parent.left : undefined
             }
@@ -79,7 +79,7 @@ QQC2.ItemDelegate {
         State {
             name: "alignCenter"
             AnchorChanges {
-                target: messageDelegate
+                target: timelineContainer
                 anchors.horizontalCenter: parent ? parent.horizontalCenter : undefined
                 anchors.left: undefined
             }