Fix popup opening at wrong place

fixes #512

resources/qml/TimelineRow.qml

@@ -28,11 +28,11 @@ Item {
 
     TapHandler {
         acceptedButtons: Qt.RightButton
-        onSingleTapped: messageContextMenu.show(model.id, model.type, model.isEncrypted, model.isEditable, row, mapToItem(timelineRoot, eventPoint.position.x, eventPoint.position.y))
+        onSingleTapped: messageContextMenu.show(model.id, model.type, model.isEncrypted, model.isEditable, row)
     }
 
     TapHandler {
-        onLongPressed: messageContextMenu.show(model.id, model.type, model.isEncrypted, model.isEditable, row, mapToItem(timelineRoot, point.position.x, point.position.y))
+        onLongPressed: messageContextMenu.show(model.id, model.type, model.isEncrypted, model.isEditable, row)
         onDoubleTapped: chat.model.reply = model.id
     }
 

resources/qml/TimelineView.qml

@@ -80,15 +80,12 @@ Page {
         property bool isEncrypted
         property bool isEditable
 
-        function show(eventId_, eventType_, isEncrypted_, isEditable_, showAt_, position) {
+        function show(eventId_, eventType_, isEncrypted_, isEditable_, showAt_) {
             eventId = eventId_;
             eventType = eventType_;
             isEncrypted = isEncrypted_;
             isEditable = isEditable_;
-            if (position)
-                popup(position, showAt_);
-            else
-                popup(showAt_);
+            popup(showAt_);
         }
 
         modal: true