clean up a couple things with the session age calculations.
clean up a couple things with the session age calculations.

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