Brazilian Portuguese translation update (0.43)

Brazilian Portuguese (PT-BR) language file updated to match Sprint 0.43... It was quite outdated (I think v0.3x), and I corrected some grammar mistakes, mistranslations (like between reload <=> refresh) and improved some of them for better understanding.
@JeffryBooher In Portuguese, the use of capitalization in the middle of a sentence is unusual (just for proper nouns), unlike English or German... So, it's more about semantics... ;)