Updating molecules in global parameters does not update nodes

[sverhoeven]

Given global molecules has single molecule and global and topoaa and valid
then adding a molecule will make topoaa form not resize from 1 to 2, but still contain a single molecule config
Also there is no button to add a molecule config so I am unable to configure topoaa for the second molecule.

I expected when I change the molecules in global parameters that the topoaa molecule configuration would resize/update accordingly.

Workaround is to upload all the molecules first and then add topoaa node.