Fix another crash on exit with tab sync enabled...
I messed up the previous fix in !1463 (merged). The EphyTabsCatalog is no longer supposed to be owned, to avoid a circular ref. But we still unref it. Oops.
I messed up the previous fix in !1463 (merged). The EphyTabsCatalog is no longer supposed to be owned, to avoid a circular ref. But we still unref it. Oops.