experimental re-embedding (#1186)

* first cut at re-embedding route and back-end support

* update and expand config route tests

* add scanpy_umap

* add reembedding to config route parameters

* front-end support for reembedding fetch and UI

* remove unused imports

* add loading state

* save reembedding in reducer state

* improve withColsFrom

* transmit reembed schema to client; pick unique embedding names

* display embeddings

* format

* lint

* spaces, tab size 2

* lint

* test hack for smoke-test race

* back out hack sleep

* add check for backed mode

* add unit test for reembedding

* lint

* hide re-embedding CLI param from help

client/src/components/menubar/subset.js

@@ -1,18 +1,17 @@
 import React from "react";
-import {AnchorButton, ButtonGroup, Tooltip} from "@blueprintjs/core";
+import { AnchorButton, ButtonGroup, Tooltip } from "@blueprintjs/core";
 import * as globals from "../../globals";
 
-
 function Subset(props) {
   const {
     subsetPossible,
     subsetResetPossible,
     handleSubset,
-    handleSubsetReset,
+    handleSubsetReset
   } = props;
 
   return (
-    <ButtonGroup style={{marginRight: "10px"}}>
+    <ButtonGroup style={{ marginRight: "10px" }}>
       <Tooltip
         content="Subset to currently selected cells and associated metadata"
         position="bottom"