Remove Continuous vars with 1 value from histogram, add to info drawer (#1927)

* remove single val continous metadata from histogram, add to info drawer

* refactor to save singleContinuous values in state

* fix edge case, single continuous values reappeard in rsb when clipped

client/src/reducers/index.js

@@ -21,7 +21,7 @@ import centroidLabels from "./centroidLabels";
 import pointDialation from "./pointDilation";
 import { reembedController } from "./reembed";
 import { gcMiddleware as annoMatrixGC } from "../annoMatrix";
-
+import singleContinuousValue from "./singleContinuousValue";
 import undoableConfig from "./undoableConfig";
 
 const Reducer = undoable(
@@ -32,6 +32,7 @@ const Reducer = undoable(
     ["ontology", ontology],
     ["annotations", annotations],
     ["layoutChoice", layoutChoice],
+    ["singleContinuousValue", singleContinuousValue],
     ["categoricalSelection", categoricalSelection],
     ["continuousSelection", continuousSelection],
     ["graphSelection", graphSelection],