James Glover

**Describe the bug** Upload of invalid CSVs for sample manifests can result in CSV::MalformedCSVError. Eg. ``` A CSV::MalformedCSVError occurred in sample_manifest_upload_with_tag_sequences#create: Invalid byte sequence in UTF-8 in line 26. app/sample_manifest_excel/sample_manifest_excel/upload/data.rb:90:in...

When creating an 'event flow' chart in superset, the section labeled 'Time' is not displayed. This prevents the 'time column' select element from rendering, and prevents configuration of the chart....