Row category based on highest cell-type category expression

[cornhundred]

I have a few examples where we generate gene expression signatures based on some single cell categories (e.g. cell type) and then add gene-level (row) categories based on which cell category the gene is most highly expressed in. This usually only adds categories for a subset of genes since not all genes are considered "signature" genes. We should simplify this process and have the following features:

• Assign each gene a category based on which cell type (or generally category) it is most highly expressed
• Calculate this in the front end after setting manual categories
• Show the P-value (-log10) as a value-based category of the one-vs-all T-test. This allows users to easily identify significantly differentially up-regulated genes in a category