Open
Description
Similar to 34eb2cb, some users (@mfiers) would find it useful to be able to add either annotations or metrics to the loom file after upload.
Implementation would be new buttons under the additional options popup for Add Cell Metric(s) and Add Cell Annotation(s), either a tsv/csv file or a URL to said file would be provided to import the data. As with the clusterings, the data would be added to the loom file, indexed and become searchable and viewable in SCope. This should mostly be just an expansion on the work done previously for clusterings.
Future improvements could leave this layer as an extra file/entry in a DB with a relation to the dataset, to allow plotting.