Translate remaining untranslated and fuzzy strings

[bruvellu]

There are strings in the latest templates and code that are not yet translated. For example:

• “Agradecimentos”
• “Curador(es)”
• “Mais filtros”
• “Escolha como combinar os campos abaixo”
• “Escolha os filtros”.

In addition, there are fields in Media and other models that have duplicated translations.

This issue depends on addressing:

• [x] #306
• [x] #311
• [x] Translate missing captions in Portuguese
• [ ] Translate remaining strings using Rosetta on staging