clarify dox and add fix default-keys behavior
clarify dox and add fix default-keys behavior

lukaswelte/metabase,jonasdiel/metabase-ptBR,zoowii/metabase,lukaswelte/metabase,zoowii/metabase,lukaswelte/metabase,Endika/metabase,dashkb/metabase,blueoceanideas/metabase,jonasdiel/metabase-ptBR,dashkb/metabase,Endika/metabase,jonasdiel/metabase-ptBR,lukaswelte/metabase,zoowii/metabase,Endika/metabase,dashkb/metabase,blueoceanideas/metabase,Endika/metabase,dashkb/metabase,Endika/metabase,blueoceanideas/metabase,jonasdiel/metabase-ptBR,zoowii/metabase,blueoceanideas/metabase,lukaswelte/metabase,zoowii/metabase,jonasdiel/metabase-ptBR,blueoceanideas/metabase,dashkb/metabase