When the number and size of tabs of a TabView are too big to fit on screen, the user can use a popup menu to select tabs from a drop down list.
However the tab that is currently shown is not emphased in the list. It is displayed like all other tabs which may be an issue when the list is really long (see provided screenshot with moderate list size).

The tab currently shown should be emphased either by writting its name in bold(er) font or by displaying a check mark (similar to those of CheckBox) next to its name or by rendering the list item with strong color.