LibGUI+Userland: Make TabWidget::*add_tab() take title using new string

Author: https://github.com/krkk
Commit: 797968c310
Pull-request: https://github.com/SerenityOS/serenity/pull/17800
Reviewed-by: https://github.com/AtkinsSJ
Reviewed-by: https://github.com/awesomekling

Userland/Applications/Spreadsheet/SpreadsheetWidget.cpp

@@ -333,7 +333,7 @@ void SpreadsheetWidget::clipboard_content_did_change(DeprecatedString const& mim
 void SpreadsheetWidget::setup_tabs(Vector<NonnullRefPtr<Sheet>> new_sheets)
 {
     for (auto& sheet : new_sheets) {
-        auto& new_view = m_tab_widget->add_tab<SpreadsheetView>(sheet->name(), sheet);
+        auto& new_view = m_tab_widget->add_tab<SpreadsheetView>(String::from_deprecated_string(sheet->name()).release_value_but_fixme_should_propagate_errors(), sheet);
         new_view.model()->on_cell_data_change = [&](auto& cell, auto& previous_data) {
             undo_stack().push(make<CellsUndoCommand>(cell, previous_data));
             window()->set_modified(true);