panelizer 7.x-3.4

This resolves some regressions in the 3.3 security release and is a recommended update for all sites.

Full changelog since 7.x-3.3:

• #2785821 by DamienMcKenna: Resolve issues with tests running on drupalci.
• #2785793 by attiks: Fix errors in panelizer_update_7115().
• #2785883 by DamienMcKenna, pbuyle, attiks, FeyP, smaz: Fixes for panelizer_update_7303() to avoid infinite loops.
• #2193221 by michel.g: 'Undefined index' errors because the 'help' variable is not always present.
• #2785945 by dsnopek, DamienMcKenna, mpotter, czigor: Fixed access-denied problem caused by needing to add the new Panels Storage API attributes to exported defaults.
• #2786471 by mpotter, dsnopek: Fixed multilingual issue with the Search API integration.
• By DamienMcKenna: Require Panels 7.x-3.6.