Refactor delegates and improve context menu opening

This unifies the context menu opening and makes sure that clicking *anywhere* on the delegate opens the context menu, not just on the content

imports/NeoChat/Component/Timeline/FileDelegate.qml

@@ -19,6 +19,8 @@ TimelineContainer {
     onReplyClicked: ListView.view.goToEvent(eventID)
     hoverComponent: hoverActions
 
+    onOpenContextMenu: openFileContext(model, fileDelegate)
+
     readonly property bool downloaded: progressInfo && progressInfo.completed
 
     function saveFileAs() {
@@ -129,14 +131,5 @@ TimelineContainer {
                 }
             }
         }
-
-        TapHandler {
-            acceptedButtons: Qt.RightButton
-            onTapped: openFileContext(model, parent)
-        }
-        TapHandler {
-            acceptedButtons: Qt.LeftButton
-            onLongPressed: openFileContext(model, parent)
-        }
     }
 }