Performance issue with creating a simulation using Expression Profiles for proteins that are not part of the model

[rwmcintosh]

Fixes #2646

Description

Rather than look for all individual Expression Parameters in a simulation, first check if the molecule is present and give a single warning if not.

Type of change

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• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires documentation changes (link at least one user or developer documentation issue):
• Algorithm update - updates algorithm documentation/questions/answers etc.
• Other (please describe):

How Has This Been Tested?

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• Integration tests
• Unit tests
• Manual tests
• No tests required

Reviewer checklist

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• Check if the code is well documented
• Check if the behavior is what is expected
• Check if the code is well tested
• Check if the code is readable and well formatted
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• Check if documentation update issue(s) are created if the option This change requires a documentation update above is selected

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Questions (if appropriate):

[msevestre]

naming is off IMO