Use Osmosis to solve remaining share group imbalances

All share groups used in presets have had the inputs rebalanced using
the Osmosis library, which respects the min/max values of the inputs in
ETEngine, and adjusts each input in an amount appropriate to the
significance of the input on the group (i.e. an input with min/max of
0/100 will be moved ten times further than one of 0/10).

Closes #790
Update Atlas to quintel/atlas@8dd12e9

Reduces the tolerance for share group imbalanced in presets from
100±0.1 to 100±0.01.