Optimize public_trial upgrade steps so we only rebuild indexes once.
Fix mail upgrade steps so they can safely be run a second time.

Also deal with the broken tuple schema when setting defaults.
Merge pull request #475 from 4teamwork/lg-merge-public-trial-upgrade-steps

Merge public trial upgrade steps
Use the same customized download view we use for documents for mails as well.
Merge pull request #483 from 4teamwork/lg-mail-download-copy

Use the same customized download view we use for documents for mails as well.
Fixed unicode decode bug in task overview.
Merge pull request #456 from 4teamwork/lk_fix_unicode_bug

Fixed unicode decode bug in task overview.
Changed German wording for value `unchecked` for both public_trial and archival_value:

"Noch nicht geprüft" -> "Nicht geprüft"
Merge pull request #447 from 4teamwork/lg-change-german-wording-for-unchecked

Wrong label for: „Nicht geprüft“
Harmonize translation defaults, to avoid i18ndude warnings.
Fixed translation for filing_number column in dossier listings.
Merge pull request #490 from 4teamwork/pg_filing_nubmer_translations

Fix translations for filing number column in dossier listings.
Also check for not supplied mails, when check if dossier could be resolved.
Add missing dependencies.
Use ftw.profilehook instead of custom import steps for opengever.base.
Add catalog tests and cleanup configure.zcml.
Use ftw.profilehook instead of custom import steps for opengever.contact.
Factor out `add_catalog_indexes` method for setuphandlers.
Add catalog tests for opengever.document.
Use ftw.profilehook instead of custom import steps for opengever.document.