tabData reducer: don't accept data for closed tabs, initialize empty data for newly opened tabs.
tabData reducer: don't accept data for closed tabs, initialize empty data for newly opened tabs.

itchio/itch,itchio/itch,itchio/itch,itchio/itch,itchio/itch,leafo/itchio-app,itchio/itchio-app,leafo/itchio-app,itchio/itchio-app,itchio/itch,itchio/itchio-app,leafo/itchio-app