Redturtle.prenotazioni

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- Fix translation mechanism for exceptions.
[folix-01]
- bookings-export remove default filter values.
[folix-01]

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- Extend bookings-export filters.
[folix-01]

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- Divide PrenotazioniFolder.week_table time choice by 5 minutes instead of 15.
[folix-01]

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- Apply validity dates restrictions for the Bookings Manger if selected flag 'apply_date_restrictions_to_manager'.
[folix-01]

- Fixed missing validity dates check during the booking creation.
[folix-01]

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- Booking additional fields.
[folix-01]

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- Remove csrf protection from send reminder endpoint.
[folix-01]