CSS Updates for Ingest

Bootstrap4 was released and we should update to no longer use the beta versions of the css. In addition, some of the classes were changed and we should update them as follows:

• form-control-warning, has-warning -> is-invalid
• form-control-feedback -> invalid-feedback
• StorageRegion edit -> Text for create is shown
• Bag index -> Depositor totals shown, no longer needed