* Disable ColorBy button for truncated categories
Fixes https://github.com/chanzuckerberg/cellxgene/issues/1156
For categories that have more than 100 labels we truncate the labels in
the UI, but still allowed users to ColorBy these categories. Coloring by
these categories can cause browsers to get bogged down.
This commit disables ColorBy for truncated categories.
* Minor documentation spelling and typo fixes
* Respond to feedback from @liaprins-czi
* Respond to feedback from @colinmegill and @bkmartinjr
* immutable crossfilter
* first cut at reducer refactor with cascade model
* add initial redo/undo implementation
* small optimization
* integrate expression with history
* add tests for new reducers and fix a couple of small initialization bugs
* treat tiny lasso selections as a clear
* better function name for clarity
* fix undo for differential expression
* remove logging
* fix regression due to bad merge
* cleanup and comments for clarity
* improve undoable configuration for flexibility
* fix stale comments
* remove debugging code from production build
* rename categoricalSelectionState
* rename file
* improve comments
Matt Weiden