fix(MembersTabPanel): unbreak context menu

- restore backwards compatibility; a lot of the actions in the component
relies on the old StatusListItem's `title` property to work correctly
- fixes the missing image and name in the profile context menu, among
others

Fixes #16367

ui/app/AppLayouts/Communities/panels/MembersTabPanel.qml

@@ -285,6 +285,8 @@ Item {
                     }
                 ]
 
+                readonly property string title: model.preferredDisplayName
+
                 width: membersList.width
                 visible: memberSearch.text === "" || title.toLowerCase().includes(memberSearch.text.toLowerCase())
                 height: visible ? implicitHeight : 0