Add function to select from a predefined list of genes

[valearna]

@Munfred will define some lists of meaningful genes for some possible experimental use cases and we will need a new component to load them

[valearna]

@Munfred you can test this feature on http://cervino.caltech.edu:8080/
I've deployed all the new features there using docker-compose. The lists of genes can be defined in the .env file in json format. I'll put the relevant genes once we hear from Wen and Daniela