batch mode on streamlit

[JoannaLeng]

Check if PERPL can run in batch more through steamlit or can process a fold of problems.

[AlistairCurd]

• Do not automatically process more than three files when they are uploaded: You need to press the done/process button to activate analysis - highlight this different functionality when it comes up.

• Hide histograms until requested for a specific input file by pressing a button.

  • But do save them.